# Seminar 15: Behavioral and Developmental Disorders ## Unit 3: Pediatrics Clerkship --- ## Learning Objectives 1. Implement developmental surveillance at every well-child visit and apply standardized screening tools at recommended ages per AAP guidelines 2. Recognize the red flags and diagnostic criteria for autism spectrum disorder and understand the role of early intervention 3. Diagnose attention-deficit/hyperactivity disorder using DSM-5 criteria and develop comprehensive management plans including behavioral and pharmacologic interventions 4. Identify specific learning disabilities and understand the evaluation process and educational support systems 5. Evaluate and manage common behavioral concerns including sleep problems, feeding difficulties, and toileting issues 6. Apply principles of early intervention services including IDEA Part C and Part B programs --- ## Lecture Outline ### Section 1: Developmental Surveillance and Screening Developmental surveillance and screening represent fundamental components of pediatric preventive care, enabling early identification of children with developmental delays who may benefit from intervention. The distinction between surveillance and screening reflects different but complementary approaches: surveillance is an ongoing process integrated into every clinical encounter, while screening involves administration of standardized tools at specific ages. Understanding when and how to implement these strategies optimizes early detection and referral for comprehensive evaluation. Developmental surveillance encompasses the ongoing process of monitoring child development through skilled observation, eliciting parental concerns, and tracking developmental milestones at every clinical encounter. This continuous process begins at the first well-child visit and continues throughout childhood, requiring familiarity with normal developmental trajectories across all domains. The pediatric clinician observes the child's behavior, interactions, and abilities during the visit while actively soliciting parental concerns, which have been shown to predict developmental problems with high sensitivity. Documentation of milestones achieved and concerns identified creates a longitudinal record that may reveal patterns not apparent from single-visit assessment. When surveillance identifies concerns, further evaluation through standardized screening or direct referral for comprehensive assessment is warranted. The American Academy of Pediatrics recommends standardized developmental screening at specific ages to supplement ongoing surveillance. Developmental screening using validated tools should occur at the nine-month, eighteen-month, and twenty-four or thirty-month well-child visits, with autism-specific screening at the eighteen-month and twenty-four-month visits. Additional screening is recommended whenever concerns arise through surveillance regardless of child age. Commonly used developmental screening tools include the Ages and Stages Questionnaire (ASQ-3), a parent-completed questionnaire assessing five developmental domains with age-specific versions, and the Parents Evaluation of Developmental Status (PEDS), which systematically collects and interprets parental concerns. The Modified Checklist for Autism in Toddlers, Revised with Follow-Up (M-CHAT-R/F) specifically screens for autism spectrum disorder at eighteen and twenty-four months. Positive screening results warrant referral for comprehensive developmental evaluation rather than expectant observation. The five developmental domains provide the framework for both surveillance and screening, each representing distinct but interrelated aspects of child development. Gross motor development encompasses the large muscle movements required for sitting, standing, walking, running, and jumping. Fine motor development involves the small muscle movements and hand-eye coordination needed for grasping, manipulating objects, and eventually drawing and writing. Language development includes both receptive language (understanding) and expressive language (communication through words and eventually sentences). Social-emotional development encompasses the child's ability to form attachments, engage in social interactions, regulate emotions, and understand others' perspectives. Cognitive development involves problem-solving, learning, memory, and the development of concepts and reasoning. Delay in a single domain suggests specific evaluation and intervention needs, while delay across multiple domains (global developmental delay) warrants comprehensive evaluation for underlying etiology. Panel A: Timeline showing AAP-recommended developmental and autism screening ages at 9, 18, 24, and 30 months with corresponding recommended screening tools. Panel B: Diagram of the five developmental domains (gross motor, fine motor, language, social-emotional, cognitive) with example milestones for each at various ages. Panel C: Flowchart showing the relationship between ongoing developmental surveillance, periodic standardized screening, and referral pathways when concerns are identified. Panel D: Sample ASQ-3 questionnaire page showing parent-friendly milestone questions with yes/sometimes/not yet response options. --- ### Section 2: Developmental Delay and Intellectual Disability Developmental delay and intellectual disability represent distinct but related diagnostic constructs, with developmental delay typically applied to young children and intellectual disability requiring formal cognitive and adaptive testing. Understanding the definitions, causes, and evaluation approaches enables appropriate diagnosis, prognostication, and intervention planning. The comprehensive evaluation aims both to characterize the child's developmental profile and to identify treatable or prognostically important underlying etiologies. The terminology surrounding developmental concerns reflects both the child's age and the nature of the concerns. Developmental delay refers to significant delay in achieving expected developmental milestones in one or more domains, typically defined as performance more than two standard deviations below the mean or significant functional limitation in age-appropriate activities. Specific developmental delay involves a single domain, such as isolated speech delay, while global developmental delay involves significant delay in two or more developmental domains and is used for children under age five. Intellectual disability (previously termed mental retardation) requires formal testing demonstrating intellectual functioning significantly below average (IQ below 70) combined with deficits in adaptive functioning across conceptual, social, and practical domains, with onset during the developmental period. This diagnosis is typically not made until the child is old enough for reliable cognitive testing, generally after age five. The causes of developmental delay and intellectual disability span genetic, prenatal, perinatal, and postnatal categories, though the etiology remains unknown in a substantial proportion of cases. Genetic causes include chromosomal abnormalities such as Down syndrome and sex chromosome variations, single gene disorders including fragile X syndrome and Rett syndrome, and copy number variants identified through chromosomal microarray. Prenatal factors include congenital infections (TORCH), teratogenic exposures with fetal alcohol syndrome being most common, and structural brain malformations. Perinatal causes include prematurity with associated complications and hypoxic-ischemic encephalopathy. Postnatal causes include central nervous system infections, traumatic brain injury, severe malnutrition and neglect, and metabolic disorders. Despite comprehensive evaluation, the cause remains unidentified in thirty to fifty percent of cases. The evaluation of developmental delay aims to characterize the child's functional abilities and identify underlying causes that may influence prognosis or management. Formal developmental or psychometric testing quantifies the child's abilities across domains and compares them with age-based norms. Hearing and vision screening should be performed in all children with developmental concerns, as sensory deficits may cause or exacerbate apparent delay and represent treatable conditions. Genetic testing, beginning with chromosomal microarray as first-line, identifies copy number variants causing intellectual disability in 15-20% of cases. Testing for fragile X syndrome should be performed in all children with unexplained intellectual disability or developmental delay, particularly boys. Neuroimaging with MRI may identify structural abnormalities contributing to delay. Metabolic screening identifies rare but potentially treatable metabolic disorders. The yield of each test varies with clinical presentation, and targeted evaluation based on clinical features often proves more efficient than undirected testing. Panel A: Hierarchical diagram showing the relationship between developmental delay (clinical term for young children) and intellectual disability (diagnostic term requiring formal testing). Panel B: Pie chart showing the distribution of identifiable causes of intellectual disability including genetic (chromosomal and single gene), prenatal environmental, perinatal, postnatal, and unknown categories. Panel C: Flowchart depicting the tiered evaluation approach for developmental delay from history and examination through targeted testing based on clinical features. Panel D: Comparison of mild, moderate, severe, and profound intellectual disability categories with typical functional expectations for each level. --- ### Section 3: Autism Spectrum Disorder Autism spectrum disorder represents a neurodevelopmental condition characterized by persistent deficits in social communication and interaction combined with restricted, repetitive patterns of behavior, interests, or activities. The prevalence has increased substantially over recent decades, now estimated at approximately 1 in 36 children in the United States, reflecting both improved recognition and broadened diagnostic criteria. Early identification enables earlier access to intervention, which improves outcomes, making recognition of early signs essential for pediatric practitioners. The diagnostic criteria for autism spectrum disorder according to DSM-5 require deficits in two core domains present from early childhood and causing clinically significant impairment. The first domain encompasses persistent deficits in social communication and social interaction across multiple contexts, manifested by deficits in social-emotional reciprocity (reduced sharing of emotions, failure of normal back-and-forth conversation, reduced initiation of social interaction), deficits in nonverbal communicative behaviors used for social interaction (poor eye contact, limited use of gestures, reduced facial expression), and deficits in developing, maintaining, and understanding relationships (difficulty adjusting behavior to social contexts, difficulty making friends, absence of interest in peers). The second domain involves restricted, repetitive patterns of behavior, interests, or activities, manifested by at least two of the following: stereotyped or repetitive motor movements, use of objects, or speech; insistence on sameness, inflexible adherence to routines, or ritualized patterns of behavior; highly restricted, fixated interests that are abnormal in intensity or focus; and hyper- or hypo-reactivity to sensory input or unusual interest in sensory aspects of the environment. Red flags for autism spectrum disorder should prompt immediate referral for comprehensive evaluation rather than watchful waiting. Absence of babbling, pointing, or meaningful gestures by twelve months represents concerning delay in early communicative development. Absence of single words by sixteen months or two-word spontaneous phrases by twenty-four months suggests language delay that, combined with other features, may indicate autism. Regression or loss of previously acquired language or social skills at any age is particularly concerning and warrants urgent evaluation. Poor eye contact, lack of response to name, absence of joint attention (sharing attention to objects or events with others through pointing or gaze), limited interest in other children, and lack of pretend play represent additional concerning features. The M-CHAT-R/F screening tool administered at eighteen and twenty-four months helps identify children requiring further evaluation, though clinical judgment remains essential as screening tools have imperfect sensitivity. Autism commonly co-occurs with other conditions that influence presentation and management. Intellectual disability accompanies autism in approximately thirty percent of cases, though the full range of intellectual ability is represented. Attention-deficit/hyperactivity disorder symptoms are common and may be diagnosed as a comorbid condition. Anxiety disorders affect many individuals with autism and contribute significantly to functional impairment. Epilepsy occurs in approximately thirty percent of individuals with autism, with risk highest in those with comorbid intellectual disability. Sleep disorders are highly prevalent and affect quality of life for children and families. Gastrointestinal symptoms including constipation and feeding difficulties occur more commonly than in typically developing children. Recognition and treatment of comorbid conditions improves overall functioning and quality of life. Panel A: Diagram illustrating the two core diagnostic domains of autism spectrum disorder with specific criteria under social communication deficits and restricted repetitive behaviors. Panel B: Timeline showing autism red flags by age from 6 months through 24 months highlighting concerning absence of expected social and communicative behaviors. Panel C: Venn diagram showing overlap of autism with common comorbid conditions including intellectual disability, ADHD, anxiety, epilepsy, and sleep disorders. Panel D: Series of images contrasting typical joint attention behavior with the absence of shared attention characteristic of autism in a toddler. --- ### Section 4: Autism Management The management of autism spectrum disorder requires a comprehensive, individualized approach addressing core symptoms, associated conditions, and family needs through behavioral interventions, educational support, and targeted pharmacotherapy when indicated. No single treatment is universally effective, and the intensity and combination of interventions should be tailored to the child's developmental level, specific challenges, and family circumstances. Early intensive intervention during the critical period of brain plasticity offers the greatest potential for improving long-term outcomes. Applied behavior analysis (ABA) represents the intervention approach with the strongest evidence base for improving outcomes in autism. ABA uses principles of learning theory to systematically teach new skills, reduce problematic behaviors, and generalize gains across settings. Early intensive behavioral intervention, typically involving twenty-five or more hours per week of structured ABA-based programming for young children, has demonstrated improvements in cognitive, language, and adaptive skills. Naturalistic developmental behavioral interventions apply ABA principles within natural contexts such as play and daily routines, promoting generalization. Discrete trial training uses structured, repetitive learning opportunities to teach specific skills, while pivotal response training targets pivotal skills that affect multiple areas of development. Speech and language therapy addresses communication deficits, potentially including augmentative and alternative communication systems for children with limited verbal ability. Occupational therapy addresses sensory processing differences, fine motor skills, and activities of daily living. Educational support forms a critical component of autism management, with services mandated by the Individuals with Disabilities Education Act. Early intervention services under Part C of IDEA serve children from birth to three years, providing therapy and special instruction in the natural environment, typically the home, with an Individualized Family Service Plan (IFSP) guiding services. Upon reaching age three, children transition to school-based services under Part B, with an Individualized Education Program (IEP) specifying educational goals, placement, and related services. Classroom placement may range from full inclusion in general education with support to specialized autism classrooms depending on the child's needs. Related services including speech therapy, occupational therapy, and social skills groups are provided through the school system. Transition planning for adolescents and young adults addresses preparation for adult life including vocational training and independent living skills. Pharmacotherapy in autism targets specific symptoms and comorbid conditions rather than core autism features, as no medication improves social communication deficits. Irritability and aggressive behavior may respond to risperidone or aripiprazole, the only FDA-approved medications for autism-related irritability, though side effects including weight gain and metabolic changes require monitoring. ADHD symptoms, common in autism, may be treated with stimulant medications or atomoxetine, though response may be less robust than in ADHD alone. Anxiety often responds to selective serotonin reuptake inhibitors, started at low doses and titrated slowly. Sleep difficulties may be addressed with sleep hygiene interventions and, when needed, melatonin supplementation. Parent training in behavioral management techniques represents an essential component of comprehensive care, enabling consistent implementation of strategies across settings and reducing family stress. Respite care, support groups, and connection with autism advocacy organizations provide additional family support. Panel A: Pyramid showing the hierarchy of autism interventions from foundational behavioral approaches (ABA, speech therapy, OT) through educational services to targeted pharmacotherapy for specific symptoms. Panel B: Comparison of early intervention (Part C) and school-based services (Part B) showing transition at age 3 with different service delivery models and documentation requirements. Panel C: Clinical photographs demonstrating discrete trial training setup for teaching matching skills and naturalistic play-based intervention for language. Panel D: Graph showing evidence for early intensive behavioral intervention effectiveness with earlier and more intensive treatment associated with better outcomes. --- ### Section 5: Attention-Deficit/Hyperactivity Disorder Attention-deficit/hyperactivity disorder represents one of the most common neurodevelopmental disorders, affecting approximately seven to nine percent of children and persisting into adulthood in the majority of cases. The condition causes significant impairment in academic, social, and family functioning through symptoms of inattention, hyperactivity, and impulsivity. Accurate diagnosis requires careful assessment to distinguish ADHD from other conditions with overlapping presentations and to identify comorbid conditions that influence management. The DSM-5 diagnostic criteria for ADHD require a persistent pattern of inattention and/or hyperactivity-impulsivity that interferes with functioning or development. Inattention is characterized by six or more symptoms in children (five or more in those over seventeen years) persisting for at least six months to a degree that is inconsistent with developmental level and negatively impacts functioning. Inattentive symptoms include failure to give close attention to details, difficulty sustaining attention, appearing not to listen when spoken to directly, failure to follow through on instructions, difficulty organizing tasks, avoidance of tasks requiring sustained mental effort, losing things necessary for tasks, being easily distracted by extraneous stimuli, and forgetfulness in daily activities. Hyperactivity-impulsivity similarly requires six or more symptoms (five or more for older adolescents and adults), including fidgeting, leaving seat in situations where remaining seated is expected, running or climbing in inappropriate situations, inability to engage quietly in leisure activities, being often on the go or driven by a motor, excessive talking, blurting out answers, difficulty waiting turn, and interrupting or intruding on others. Additional diagnostic requirements ensure appropriate application of criteria. Several symptoms must have been present before age twelve, though formal diagnosis is not required in childhood. Symptoms must be present in two or more settings such as home and school, preventing misattribution of situational behavior to a disorder. There must be clear evidence that symptoms interfere with or reduce the quality of social, academic, or occupational functioning. Symptoms must not be better explained by another mental disorder such as anxiety, depression, or substance use. ADHD is classified into three presentations based on symptom patterns: combined presentation when criteria for both inattention and hyperactivity-impulsivity are met, predominantly inattentive presentation when only inattention criteria are met, and predominantly hyperactive-impulsive presentation when only hyperactivity-impulsivity criteria are met. The predominantly inattentive presentation, more common in girls, may be underrecognized as it lacks the disruptive hyperactivity that often prompts evaluation. The differential diagnosis of ADHD symptoms is broad and requires careful consideration. Anxiety disorders may cause difficulty concentrating, restlessness, and appearing not to listen. Depression may manifest as poor concentration, decreased motivation, and disorganization. Learning disabilities cause academic struggles that may be attributed incorrectly to inattention. Sleep disorders, including insufficient sleep, obstructive sleep apnea, and restless leg syndrome, cause symptoms resembling ADHD and should be screened for in all evaluations. Hearing impairment may present as inattention and not following directions. Substance use in adolescents may cause attention and behavioral changes. Medical conditions including thyroid disorders and seizure disorders rarely present with attention difficulties. Evaluation should include gathering information from multiple sources including parent and teacher rating scales, academic records, and clinical observation, enabling comprehensive assessment of symptoms across settings. Panel A: Diagram showing DSM-5 ADHD diagnostic criteria with the two symptom domains (inattention and hyperactivity-impulsivity) and required number of symptoms by age. Panel B: Venn diagram illustrating the three ADHD presentations (combined, predominantly inattentive, predominantly hyperactive-impulsive) with typical features of each. Panel C: Flowchart for ADHD evaluation showing information gathering from multiple sources, consideration of differential diagnosis, and assessment for comorbid conditions. Panel D: Chart comparing ADHD symptoms with overlapping features of anxiety, depression, and sleep disorders to guide differential diagnosis. --- ### Section 6: ADHD Management The management of ADHD employs a multimodal approach combining behavioral interventions, educational accommodations, and pharmacotherapy tailored to the child's age, symptom severity, and functional impairment. Treatment goals focus on reducing symptoms, improving functioning in academic, social, and family domains, and preventing complications including academic failure, social difficulties, and risk-taking behavior. Regular monitoring enables treatment optimization and identification of emerging concerns. Behavioral therapy forms an essential component of ADHD management, representing first-line treatment for children under six years and an important adjunct to medication for older children. Parent training in behavior management teaches specific strategies including positive reinforcement, consistent consequences, effective commands, and structured routines. These skills enable parents to implement consistent behavioral expectations and respond effectively to challenging behaviors. Classroom interventions address the school environment where ADHD symptoms often cause the greatest impairment. Preferential seating near the teacher and away from distractions, breaking assignments into smaller segments, providing written instructions, allowing movement breaks, and implementing structured reward systems help children with ADHD succeed academically. Organizational skills training teaches children strategies for keeping track of assignments, managing time, and organizing materials. For children under six years of age, the American Academy of Pediatrics recommends behavioral therapy as first-line treatment before medication trial, given concerns about medication effects during early brain development. Stimulant medications represent the most effective pharmacologic treatment for ADHD, with approximately seventy to eighty percent of children demonstrating significant improvement. Methylphenidate and amphetamine formulations are available in short-acting, intermediate-acting, and long-acting preparations, allowing tailoring of duration of effect to the child's needs. Short-acting formulations require multiple daily doses but allow flexible dosing; long-acting formulations provide sustained effect throughout the school day with single morning dosing. The mechanism involves increased dopaminergic and noradrenergic neurotransmission in prefrontal circuits involved in attention and executive function. Common side effects include appetite suppression, sleep difficulties, and mild increases in heart rate and blood pressure. Growth velocity may be slightly reduced, requiring monitoring of height and weight. Rare but serious concerns include cardiovascular events, making baseline cardiac evaluation appropriate for patients with concerning history or examination findings. Non-stimulant medications provide alternatives when stimulants are ineffective, cause intolerable side effects, or are contraindicated. Atomoxetine, a selective norepinephrine reuptake inhibitor, is taken daily and reaches full effect over several weeks, offering twenty-four-hour symptom coverage without abuse potential. Extended-release guanfacine and clonidine, alpha-2 adrenergic agonists, may be used as monotherapy or adjunctive to stimulants, particularly helpful for hyperactivity, impulsivity, and comorbid tics. Viloxazine, a norepinephrine reuptake inhibitor recently approved for ADHD, offers another non-stimulant option. Monitoring during pharmacotherapy should include height and weight at every visit with plotting on growth curves, blood pressure and heart rate measurement, assessment of symptom response using validated rating scales, and evaluation for side effects. The optimal dose produces maximum symptom improvement with minimum side effects and is determined through titration rather than weight-based calculation. Panel A: Stepped treatment algorithm for ADHD showing behavioral therapy as first-line for children under 6 and medication plus behavioral therapy for those 6 and older, with subsequent steps for inadequate response. Panel B: Comparison chart of stimulant and non-stimulant ADHD medications showing mechanism, duration of action, common side effects, and appropriate clinical scenarios for each. Panel C: Growth chart demonstrating typical pattern of height velocity reduction with stimulant treatment and expected catch-up upon discontinuation. Panel D: Parent and teacher ADHD rating scale examples showing symptom frequency assessment used for monitoring treatment response. --- ### Section 7: Learning Disabilities Learning disabilities represent neurodevelopmental conditions causing unexpected difficulty in acquiring specific academic skills despite adequate intelligence, instruction, and motivation. These conditions affect approximately five to ten percent of school-age children and persist into adulthood, though appropriate intervention and accommodations enable academic and vocational success. Understanding the types of learning disabilities, their evaluation, and available supports enables appropriate referral and advocacy. The specific types of learning disabilities are classified by the academic domain affected. Dyslexia, affecting reading, is the most common learning disability, characterized by difficulties with accurate or fluent word recognition, poor decoding, and spelling difficulties despite adequate phonemic awareness instruction. Affected individuals may have strengths in areas not dependent on reading fluency. Dysgraphia involves difficulty with written expression including handwriting, spelling, and composition, often with discrepancy between oral and written communication abilities. Dyscalculia affects mathematical reasoning, number sense, calculation, and mathematical problem solving. Language-based learning disabilities involve receptive and/or expressive language difficulties that impact academic learning. Nonverbal learning disabilities, while controversial as a distinct entity, describe patterns of strength in verbal abilities with weakness in visual-spatial processing, social perception, and mathematics. Many individuals have difficulties spanning multiple domains rather than fitting neatly into single categories. The evaluation of suspected learning disabilities typically involves psychoeducational testing that assesses cognitive abilities and academic achievement. The traditional discrepancy model identifies learning disabilities when academic achievement is significantly below what would be predicted based on measured intelligence. Response to intervention (RTI) provides an alternative approach, identifying learning disabilities when children fail to respond to evidence-based instruction of increasing intensity. School-based evaluation through special education processes is available at no cost to families upon parental request. Comprehensive evaluation should include cognitive testing measuring intellectual ability, achievement testing assessing reading, writing, and mathematics skills, and assessment of specific processes such as phonological awareness for reading difficulties. Hearing and vision screening should be completed to exclude sensory contributions to academic struggles. Evaluation distinguishes learning disabilities from intellectual disability, ADHD, emotional disorders, and inadequate instruction, though these conditions may coexist. Educational interventions and accommodations support academic success for students with learning disabilities. For dyslexia, evidence-based interventions include explicit, systematic phonics instruction emphasizing sound-symbol relationships, multisensory teaching approaches engaging visual, auditory, and kinesthetic modalities, and repeated reading practice to build fluency. Accommodations through Individualized Education Programs (IEPs) for those qualifying for special education or 504 plans for those needing accommodations without specialized instruction may include extended time on tests, reduced assignment length, provision of notes or outlines, use of audiobooks and text-to-speech technology, alternative means of demonstrating knowledge, and preferential seating. Assistive technology including speech-to-text software, calculators, and graphic organizers provides tools to bypass areas of weakness. Early identification and intervention produce better outcomes than waiting for failure, emphasizing the importance of prompt referral when learning difficulties are suspected. Panel A: Diagram showing the types of specific learning disabilities (dyslexia, dysgraphia, dyscalculia, language-based) with the academic domains affected and characteristic features of each. Panel B: Comparison of discrepancy model versus response to intervention approaches for learning disability identification showing conceptual differences. Panel C: Pyramid showing multi-tiered system of supports (MTSS) with universal instruction at the base, targeted small group intervention at tier 2, and intensive individualized intervention at tier 3. Panel D: Examples of assistive technology tools for learning disabilities including text-to-speech, speech-to-text, graphic organizers, and audiobook applications. --- ### Section 8: Speech and Language Disorders Speech and language disorders affect communication and represent among the most common developmental concerns prompting pediatric referral. Distinguishing between speech disorders (affecting the production of sounds) and language disorders (affecting understanding and use of words and sentences) guides appropriate evaluation and intervention. Early identification and treatment optimize outcomes, as the early years represent a critical period for language development. The types of speech and language disorders reflect different aspects of the communication system. Expressive language disorder involves difficulty producing language, with limited vocabulary, short sentence length, and difficulty retrieving words despite adequate receptive understanding. Receptive language disorder involves difficulty understanding spoken language, following directions, and comprehending questions, often accompanied by expressive difficulties. Mixed receptive-expressive language disorder affects both understanding and production. Speech sound disorders include articulation disorders affecting production of individual sounds and phonological disorders involving patterns of sound errors reflecting underlying difficulties with the phonological system. Childhood apraxia of speech involves motor planning difficulties affecting the sequencing and coordination of movements for speech production. Fluency disorders, most commonly developmental stuttering, involve disruptions in the flow of speech including repetitions, prolongations, and blocks. Social communication disorder involves difficulty with the social uses of verbal and nonverbal communication, such as adjusting communication to context and following conversational rules, without the restricted repetitive behaviors that would indicate autism. Red flags for speech and language disorders at various ages prompt referral for evaluation. By twelve months, children should be babbling with consonant sounds and responding to their name. Absence of words by eighteen months or failure to follow simple commands warrants evaluation. By twenty-four months, children should have at least fifty words and be combining two words into phrases; vocabulary below twenty-five words or absence of word combinations indicates significant delay. By three years, most speech should be intelligible to unfamiliar listeners, and sentences of three or more words should be typical. Regression or loss of previously acquired language at any age requires urgent evaluation. Persistent difficulty being understood, frustration with communication, or lack of expected language progress at any age merits assessment. Evaluation of speech and language concerns begins with audiologic assessment, as hearing loss can cause or contribute to communication difficulties and represents a treatable condition. Comprehensive speech-language evaluation by a certified speech-language pathologist assesses receptive and expressive language, speech sound production, fluency, voice, and pragmatic language skills. Developmental assessment evaluates whether speech and language difficulties occur in isolation or as part of broader developmental delays, with global delays warranting more comprehensive evaluation. Autism screening should be performed when language delay is accompanied by social communication concerns. Intervention through speech-language therapy addresses specific deficits identified through evaluation. Early intervention services provide therapy for children under three years. School-based services are available for older children through the IEP process. Parent training in language-stimulating strategies enables consistent practice within daily routines and interactions. Panel A: Diagram distinguishing speech disorders (articulation, phonological, apraxia, fluency) from language disorders (expressive, receptive, mixed) with examples of how each affects communication. Panel B: Timeline showing speech and language milestones with red flag markers indicating when referral is warranted for failure to achieve expected skills. Panel C: Audiogram showing typical hearing loss patterns and the speech frequencies affected, illustrating why hearing screening is essential in speech and language evaluation. Panel D: Parent implementing language-stimulation strategies during daily activities including narrating actions, expanding child utterances, and using books for vocabulary building. --- ### Section 9: Behavioral Concerns Common behavioral concerns bring many families to pediatric care seeking guidance and support. Understanding the developmental context of behaviors, distinguishing typical variation from problems requiring intervention, and applying evidence-based management strategies enables effective counseling. Reassurance about normal development, anticipatory guidance, and specific behavioral recommendations address most concerns without need for specialty referral. Temper tantrums represent a nearly universal developmental phenomenon peaking between eighteen and thirty-six months as toddlers experience intense emotions they cannot yet regulate or express verbally. Normal tantrums are typically brief, occurring less than daily, responsive to distraction or parent intervention, and not accompanied by self-injury or aggression. Prolonged, frequent, or severe tantrums may indicate developmental concerns, environmental stressors, or emerging behavioral disorders warranting further evaluation. Management of typical tantrums emphasizes prevention through maintaining routines, avoiding hunger and overtiredness, offering limited choices to support autonomy, and preparing children for transitions. During tantrums, remaining calm, ensuring safety, and avoiding reinforcement of tantrum behavior through attention or capitulation helps tantrums resolve without escalation. Praise for calming down and positive attention for appropriate behavior shape more adaptive responses over time. Sleep problems affect many children and significantly impact family functioning. Bedtime resistance responds to consistent routines, firm limits, and avoiding stimulating activities before bed. Night wakings in infants may be developmentally appropriate but can persist when reinforced by feeding or parental presence to sleep; graduated extinction approaches teach self-soothing while minimizing crying. Nightmares are normal, brief, remembered by the child, and respond to reassurance; they may increase during periods of stress. Night terrors represent partial arousal from deep sleep with apparent fear and autonomic activation; the child is not fully awake, will not remember the episode, and should not be awakened. Management involves ensuring safety, avoiding triggers such as sleep deprivation, and waiting for the episode to resolve. Sleep hygiene principles for all ages include consistent sleep-wake times, appropriate bedroom environment, avoiding screens before bed, and adequate total sleep duration for age. Feeding difficulties and picky eating cause significant parental concern but usually reflect normal developmental patterns. Division of responsibility, in which parents decide what foods to offer and when while children decide how much to eat, reduces mealtime stress and promotes healthy eating patterns over time. Pressure to eat, bribing with dessert, and short-order cooking for picky eaters typically backfire by increasing food refusal and decreasing dietary variety. Repeated exposure to new foods, family meals, and modeling healthy eating gradually expand food acceptance. Concerning features warranting evaluation include weight loss or poor growth, extremely limited food variety, texture aversions severe enough to affect nutrition, and oral motor difficulties affecting eating. Toileting concerns including enuresis and encopresis are common and were addressed in the renal lecture; readiness for toilet training typically emerges between two and three years, and pressure before readiness often delays success. Panel A: Graph showing developmental trajectory of temper tantrums with frequency peaking at 18-36 months and gradually declining through preschool years. Panel B: Comparison of nightmares and night terrors showing differences in timing during sleep cycle, child's state during episode, memory of event, and appropriate parent response. Panel C: Diagram of sleep hygiene principles for children showing consistent routine, appropriate environment, avoidance of screens, and age-appropriate sleep duration. Panel D: Illustration of division of responsibility in feeding showing parent role (what, when, where) and child role (whether, how much) reducing mealtime conflict. --- ### Section 10: Early Intervention Early intervention services represent a critical component of developmental care, providing therapy and support to children with developmental delays during the period of greatest brain plasticity. Understanding the federal mandates governing these services, the referral process, and the transition between programs enables pediatricians to effectively connect families with appropriate resources. Early intervention improves developmental outcomes, particularly when services begin promptly after identification of delays. Part C of the Individuals with Disabilities Education Act (IDEA) mandates early intervention services for children from birth to three years with developmental delays or conditions associated with developmental delay. Services are provided at no cost to families regardless of income. Eligibility is determined by state-defined criteria for developmental delay or diagnosis of a condition with high probability of delay. Services are family-centered, recognizing that supporting caregivers enhances child outcomes, and are provided in natural environments, typically the home or childcare setting, to promote generalization of skills. The Individualized Family Service Plan (IFSP) documents the child's present level of development, family priorities, outcomes to be achieved, and services to be provided. Services may include developmental specialist intervention, speech-language therapy, occupational therapy, physical therapy, and family support. A service coordinator helps families navigate the system and access needed services. Part B of IDEA governs special education services for children three through twenty-one years, with educational services provided through the public school system. Transition from Part C to Part B begins before the child's third birthday, with planning to ensure continuity of services. Eligibility for Part B services requires meeting state criteria for disability categories and demonstrating need for specialized instruction. The Individualized Education Program (IEP) replaces the IFSP, specifying educational goals, placement, specialized instruction, and related services such as speech therapy, occupational therapy, and transportation. The least restrictive environment principle requires that children with disabilities be educated with typically developing peers to the maximum extent appropriate. Placement options range from full inclusion in general education with supports to specialized classrooms or schools depending on child needs. The evidence supporting early intervention demonstrates improved outcomes across multiple domains. Children receiving early intervention show greater gains in cognitive, language, motor, and adaptive skills compared with children who do not receive services or receive delayed services. The earlier intervention begins, the better the outcomes, reflecting the heightened plasticity of the young brain. Intensity of intervention matters, with more intensive programs generally producing larger effects, particularly for children with autism. Parent involvement enhances outcomes by ensuring consistent practice and generalization across settings. Despite strong evidence for benefit, access to early intervention varies geographically, and families face barriers including lack of awareness, complicated referral processes, and insufficient service availability. Pediatricians play a crucial role in identifying children who may benefit, making timely referrals, and advocating for adequate services. Panel A: Timeline showing early intervention service structure from birth through school age with Part C serving 0-3 years and Part B beginning at age 3, highlighting the transition process. Panel B: Comparison of IFSP (family-centered, natural environment, service coordinator) and IEP (education-focused, school-based, special education services) documentation and service delivery models. Panel C: Graph showing evidence for early intervention with developmental trajectories comparing children receiving early versus delayed intervention demonstrating better outcomes with earlier service initiation. Panel D: Diagram showing the referral pathway from pediatric identification through state early intervention program evaluation to service delivery and monitoring. --- ## Summary - Developmental screening is recommended at 9, 18, and 24-30 months using standardized tools such as ASQ-3, with autism-specific screening (M-CHAT-R/F) at 18 and 24 months - Autism red flags include no babbling or pointing by 12 months, no words by 16 months, no two-word phrases by 24 months, and loss of language or social skills at any age - Autism diagnosis requires deficits in social communication (reciprocity, nonverbal communication, relationships) plus restricted repetitive behaviors, present from early childhood - ADHD diagnosis requires six or more symptoms of inattention and/or hyperactivity-impulsivity, present before age 12, in two or more settings, causing functional impairment - ADHD treatment for children under 6 years begins with behavioral therapy; for ages 6 and older, medication plus behavioral therapy is recommended - Stimulant medication monitoring includes height, weight, blood pressure, and heart rate at every visit - Learning disabilities cause unexpected academic difficulty despite adequate intelligence and instruction, with dyslexia being most common - Speech delay red flags: no words by 18 months, no two-word phrases by 24 months, or speech not intelligible to strangers by 3 years - Early intervention (Part C, birth to 3) provides family-centered services in natural environments with an IFSP; transition to Part B school services occurs at age 3 - Common behavioral concerns including tantrums, sleep problems, and picky eating usually represent normal development and respond to consistent behavioral approaches --- ## Key Terms | Term | Definition | |------|------------| | Global developmental delay | Significant delay in two or more developmental domains in children under 5 years | | ASQ-3 | Ages and Stages Questionnaire, a parent-completed developmental screening tool | | M-CHAT-R/F | Modified Checklist for Autism in Toddlers, Revised with Follow-Up, autism screening tool for 18-24 months | | Applied Behavior Analysis | Evidence-based intervention approach for autism using principles of learning theory | | IEP | Individualized Education Program specifying educational goals and services for students with disabilities | | IFSP | Individualized Family Service Plan documenting early intervention services for children birth to 3 | | Dyslexia | Specific learning disability affecting reading characterized by difficulty with word recognition and decoding | | Stimulant medication | First-line pharmacotherapy for ADHD including methylphenidate and amphetamine formulations | --- *This content is subject to the [MIT License](https://opensource.org/licenses/MIT). © 2024–2026 Hibbert School of Medicine.*