Wilkinson Ch 3

CHAPTER 3: BEST PRACTICE IN ASSESSMENT

PRIMARY GOALS OF ASD ASSESSMENT

• Objectives of conducting assessments for Autism Spectrum Disorder (ASD):

  • Determine the presence and severity of ASD symptoms to facilitate early diagnosis and timely intervention.

  • Develop individualized interventions for educational planning by identifying specific strengths, weaknesses, and learning styles.

  • Collect data for ongoing progress monitoring, allowing for adjustments to interventions and measurement of their effectiveness (Shriver, Allen, and Mathews, 1999).

  • Identify if an ASD has been overlooked, misclassified, or if symptoms are better explained by other conditions.

  • Describe any co-occurring (comorbid) disorders associated with ASD, which is crucial for differential diagnosis and comprehensive treatment planning, and suggest alternative classifications when appropriate.

• Common co-occurring disorders:

  • Neurodevelopmental disorders such as:

  • Attention-Deficit/Hyperactivity Disorder (ADHD)

  • Intellectual disability (ID)

  • Developmental coordination disorder

  • Language impairment

  • Specific learning disorder (disability)

  • Emotional disorders, including:

  • Anxiety disorders (e.g., generalized anxiety, social anxiety)

  • Depression

  • Disruptive behavior disorders (e.g., Oppositional Defiant Disorder)

• Authoritative Organizations' Recommendations:

  • Comprehensive, multidisciplinary assessments are endorsed by leading professional bodies:

  • American Academy of Neurology (Filipek et al., 2000)

  • American Academy of Child and Adolescent Psychiatry (Volkmar et al., 2014)

  • Consensus panels from multiple professional societies (Filipek et al., 1999, 2000), emphasizing the need for thorough and evidence-based evaluation.

BEST PRACTICE IN ASSESSMENT

• Criteria for identification of autism:

  • Conducted by a professional team, typically including psychologists, speech-language pathologists, occupational therapists, neurologists, and educators, ensuring diverse clinical perspectives.

  • Utilizes multiple data sources to enhance reliability and reduce bias, integrating information from various contexts and informants.

  • Evaluation of key domains including social behavior, language & communication, adaptive behavior, motor skills, sensory issues, and cognitive functioning, as ASD manifests across these areas.

COMPREHENSIVE DEVELOPMENTAL ASSESSMENT APPROACH

• Important considerations in the assessment process:

  • A developmental perspective is crucial: Recognizing that the core symptoms of ASD present during early childhood but affect adaptive functioning throughout life, with manifestations evolving across developmental stages.

  • Evaluating within a developmental framework aids in understanding the severity and quality of delays or differences, rather than just their presence (Klin et al., 2005).

• Recommended assessment procedures:

  • Use a variety of convergent methods, including structured and unstructured interviews (with parents, caregivers, teachers), direct observation schedules in various settings, and standardized assessments of:

  • Social behavior and reciprocity

  • Language & communication (expressive, receptive, pragmatic)

  • Adaptive behavior (daily living, socialization, communication skills)

  • Motor skills (fine and gross motor coordination)

  • Sensory issues (hyper/hypo-sensitivities)

  • Atypical behaviors and repetitive patterns

  • Cognitive functioning (intellectual abilities, problem-solving)

  • Best practice emphasizes an interdisciplinary team approach for a comprehensive developmental and psychosocial profiling, which is essential to guide individualized interventions effectively.

PRINCIPLES GUIDING ASSESSMENT AND EVALUATION PROCESS

1. Referral for comprehensive assessment: Students who screen positive for ASD are to be referred for a detailed, in-depth evaluation, not just a simple diagnostic label, to understand their full profile.

2. Attention to co-occurring disorders: Close attention to signs and symptoms of other childhood disorders is important for accurate differential diagnosis and appropriate intervention strategies.

3. Developmental history exploration: A thorough review of developmental history and key skills such as speech and communication is essential for understanding the onset and trajectory of symptoms, including any regressive loss of skills.

4. Family medical history review: Consideration of psychosocial factors that may impact development, as well as family medical history, is important to identify genetic predispositions or other biological factors.

5. Multiple data integration: Combining information from various sources (parents, teachers, direct observation, standardized tests) strengthens assessment reliability and validity by providing a comprehensive and triangulated view of the child's functioning.

6. Academic achievement evaluation: Important for addressing learning and behavioral concerns, identifying specific learning disorders that frequently co-occur with ASD, and guiding individualized education plans (IEPs).

7. Instructional objectives development: Based on the unique strengths and weaknesses of the child, tailoring interventions to maximize each child's potential.

8. Communication and social reciprocity evaluation: Must be assessed as core features of ASD, examining both verbal and nonverbal communication across multiple contexts.

9. Assessment of Restricted and Repetitive Behavior (RRB): As a core feature of ASD, these behaviors need to be thoroughly evaluated to understand their impact on daily functioning and inform targeted interventions.

• Assessment methodologies include: Verbal reports from parents/caregivers or teachers, direct observation of the child in structured and unstructured settings, direct evaluations using standardized psychometric tests, and third-party reports from other professionals (Filipek et al., 1999; Shriver et al., 1999).

  • This involves a continuous collaborative assessment process among all involved professionals and families, prioritizing necessary domains for assessment based on the individual's needs.

COMPONENTS OF A BEST PRACTICE ASSESSMENT FOR SCHOOL-AGE CHILDREN

• Key components of the assessment include:

  • Record review: Focus on the child's early developmental history, past diagnoses, previous interventions, and concerns via parental feedback, detailed school records, and medical reports.

  • Developmental and medical history: A comprehensive parent/caregiver interview is imperative to gather detailed information on the child’s developmental milestones (e.g., first words, walking), onset of atypical behaviors, and family history of neurological or psychiatric conditions.

  • Medical screening and evaluation: Identifies co-occurring medical conditions (e.g., gastrointestinal issues, sleep disturbances) and recognizes underlying etiology for ASD symptoms, helping to rule out other causes or identify conditions like fragile X syndrome, tuberous sclerosis, or other chromosomal abnormalities.

  • Parent/caregiver interview: Provides extensive and longitudinal insights into their child’s early development, current behaviors, and challenges in various settings.

  • Direct child observation: Essential in both structured clinical settings and naturalistic environments for evaluating behaviors associated with ASD, especially during social interactions.

  • Parent/teacher ratings of social competence: Provide crucial insight into social communication abilities, repetitive behaviors, and adaptive skills across diverse contexts (home, school, community).

  • Cognitive/intellectual assessment: Establishes cognitive ability for classification and intervention planning.

  • Academic assessment: Supports educational planning and identifies specific learning disorders.

  • Communication and language assessment: Evaluates expressive, receptive, and pragmatic language skills.

  • Assessment of restricted and repetitive behavior (RRB): Explores type, frequency, intensity, and functional impact of RRBs.

  • Adaptive behavior assessment: Identifies efficacy of intervention and overall daily functioning.

EVIDENCE-BASED ASSESSMENT TOOLS

• Assessment requirements: Tools must show strong reliability (consistency of measurement) and validity (measuring what it intends to measure) for problem identification, monitoring interventions, and evaluating outcomes (Mash and Hunsley, 2005; Ozonoff et al., 2007).

  • Must demonstrate effectiveness in diagnosis, clinical formulation, intervention planning, and outcome assessment (Wilkinson, 2014a), ensuring that the data gathered is meaningful and actionable.

• Table 3.1: Recommended Core Measures for Comprehensive Developmental Assessment for ASD.

• Skills and qualifications: Individuals administering tests must be adequately supervised or possess academic coursework in psychological tests, understand psychometric principles (e.g., standardization, norm-referenced scoring), and have experience in test administration to ensure accurate and ethical practice.

MEASURES FOR ASSESSING CORE DOMAINS OF ASD

• Assessment measures: Table 3.1 lists various measures covering core domains in assessment for ASD. These tools have been recognized for their relevance, strong psychometric properties, and reliability in evaluating ASD characteristics, aiding in comprehensive diagnosis and intervention planning.

CORE ASSESSMENT DOMAINS

• Initial steps in assessment include:

  • Record review:

  • Focus on the child's early developmental history, documented concerns, and previous evaluations via parental feedback, detailed school records, and medical or psychological reports to gain a historical perspective.

  • Data from medical, school, or psychological records are significant for understanding trajectories and past efforts.

  • Developmental/Medical history:

  • A comprehensive parent/caregiver interview is imperative to gather detailed information on the child’s developmental milestones (e.g., first words, walking), onset of atypical behaviors, and any family history of neurological or psychiatric conditions that might be relevant.

  • Medical screening/evaluation:

  • Identifies co-occurring medical conditions (e.g., gastrointestinal issues, sleep disturbances) and recognizes underlying etiology for ASD symptoms, helping to rule out other causes or identify specific genetic disorders like fragile X syndrome, tuberous sclerosis, or other chromosomal abnormalities.

PARENT/CAREGIVER INTERVIEW

• Importance:

  • Parents provide the most comprehensive and longitudinal insights into their child’s early development, current behaviors, and challenges in various settings (home, community, school), which are critical for an accurate ASD diagnosis.

• Key assessment tool:

  • Autism Diagnostic Interview, Revised (ADI-R): A gold-standard, semi-structured clinical interview used by experienced clinicians to gather information on the three core areas of ASD.

  • The ADI-R includes: - 93 items covering three domains:

    1. Reciprocal Social Interactions: difficulties in social overtures, shared enjoyment, nonverbal communication, and peer relationships.

    2. Language and Communication: current and historical language delays, stereotyped or repetitive language, and communicative intent.

    3. Restricted, Repetitive, and Stereotyped Behaviors and Interests: unusual preoccupations, motor mannerisms, insistence on sameness, and unusual sensory interests.

  • Administration takes approximately 1.5 to 2.5 hours, demanding significant time and training.

  • Validity depends heavily on the interviewer’s training, experience, and adherence to administration guidelines.

• Alternative measures:

  • Social Communication Questionnaire (SCQ): A shorter and quicker alternative for parents, acting as a screening tool.

  • Covers similar domains to the ADI-R, providing a quick assessment of pervasive developmental disorder symptoms.

  • Lifetime and current forms assess various aspects for intervention planning, allowing for tracking of symptom change over time.

DIRECT OBSERVATION

• Methodology:

  • Observation is essential in both structured clinical settings (e.g., during administration of standardized tools) and naturalistic environments (e.g., classroom, playground) for evaluating specific behaviors associated with ASD, particularly social interaction and communication subtleties.

• Key Assessment Tool:

  • Autism Diagnostic Observation Schedule, Second Edition (ADOS-2): A semi-structured, standardized assessment of communication, social interaction, play, and repetitive behaviors.

  • It involves inviting the child to engage in a series of planned activities designed to elicit behaviors relevant to ASD diagnosis.

  • Takes 40-60 minutes for administration by a trained examiner.

  • Uses algorithms for behavior classification, providing standardized scores and yielding categories like Autism, Autism Spectrum, and Non-Spectrum, comparing the individual's observed behaviors to typically developing individuals.

• Other instruments include:

  • Childhood Autism Rating Scale, Second Edition (CARS-2): A widely used measure to distinguish children with ASD from those without, and to determine the severity of autism via 15-item rating scales.

  • Must be backed up by parent reports and comprehensive evaluations, as observation in a single setting may not capture the full range of behaviors or reflect typical daily functioning.

PARENT/TEACHER RATINGS

• Functionality:

  • Provide crucial insight into social communication abilities, repetitive behaviors, and adaptive skills in diverse contexts (e.g., home, school, community), complementing direct observation and interviews.

• Reliable Tools:

  • Autism Spectrum Rating Scales (ASRS) and Social Responsiveness Scale (SRS-2): Both are validated questionnaires useful for assessing the prevalence and severity of ASD symptoms across various environments.

  • Both instruments assess behavior, guide treatment planning, and monitor intervention effectiveness over time.

  • Caution is necessary when using poorly performing tools like GARS-2, which have demonstrated insufficient sensitivity and credibility for classification due to methodological flaws and lack of discriminant validity.

DIRECT TESTING

• Considerations and Best Practices:

  • Cognitive/intellectual assessments should be strategically designed to ensure their validity and suitability for children with ASD, often requiring more flexible administration and accommodations due to their unique learning styles and behavioral presentations.

  • Cognitive assessments must address potential confounding factors such as distracting behaviors, significant social communication deficits, and atypical sensory processing issues that might impact performance and test results.

COGNITIVE/INTELLECTUAL FUNCTIONING

• Significance:

  • Establishing cognitive ability is crucial not only for classification but also for individualizing intervention planning, as the level of intellectual functioning significantly impacts learning ability, adaptive skills, and the overall severity of ASD symptoms.

• Best Practice Guidelines:

  • Cognitive assessments must not confirm ASD presence alone but provide invaluable insight into a child's unique cognitive strengths and weaknesses, which is essential for informing educational strategies and maximizing potential.

  • Children’s specific IQ profiles, including verbal-performance discrepancies, are essential for understanding their educational needs and developing targeted academic and social interventions.

• Statistics:

  • As per CDC (2014), 31% of children with ASD have IQ scores within the intellectual disability range (IQ $\leq 70$).

  • 23% in the borderline range (IQ $= 71\text{--}85$) and 46% in the average or above average range (IQ >85).

ACADEMIC ACHIEVEMENT

• Assessment Necessity:

  • Assess academic achievement across core subjects (reading, writing, math) to support educational planning, identify specific learning disorders that frequently co-occur with ASD, and ensure appropriate academic accommodations and modifications.

  • Tools include Woodcock-Johnson IV (WJ IV ACH), Wechsler Individual Achievement Test–Third Edition (WIAT-III), and Kaufman Test of Educational Achievement–Third Edition (KTEA-3) for comprehensive profiling of academic strengths and weaknesses.

SOCIAL COMMUNICATION AND LANGUAGE EVALUATION

• Core Assessment Area:

  • Thoroughly evaluate both expressive and receptive language skills, as well as pragmatic language use (the social application of language), which are essential for long-term social and academic outcomes and constitute a core deficit in ASD.

  • Instruments such as Peabody Picture Vocabulary Test–Fourth Edition (PPVT-4), Clinical Evaluation of Language Fundamentals–Fifth Edition (CELF-5), and Test of Pragmatic Language–Second Edition (TOPL-2) measure various language competencies and their functional use.

ASSESSMENT OF RESTRICTED AND REPETITIVE BEHAVIOR (RRB)

• Importance:

  • The DSM-5 defines RRBs (e.g., stereotyped movements, insistence on routines, highly restricted interests, unusual sensory interests) as central to an ASD diagnosis, requiring comprehensive assessment to understand their type, frequency, intensity, and functional impact on the individual's life.

  • Various measures collectively assess the presence and behavioral impact of RRBs, including the Repetitive Behavior Scale–Revised (RBS-R) and the Repetitive Behavior Questionnaire-2 (RBQ-2), providing detailed insights into these core features.

ADAPTIVE BEHAVIOR ASSESSMENT

• Functionality Testing:

  • Critical for identifying the efficacy of interventions and evaluating overall daily functioning across various environments, as adaptive skills are often significantly impaired in individuals with ASD.

  • Instruments like Vineland Adaptive Behavior Scales–II (VABS-II) and Developmental Profile-3 (DP-3) focus on measuring adaptive skills in communication, daily living (e.g., self-care, home living), and socialization, providing a comprehensive picture of an individual's practical skills.

ADDITIONAL DOMAINS OF ASSESSMENT

• Consideration for Comprehensive Assessment:

  • To gain a holistic understanding of the individual's profile, it is crucial to address areas beyond the immediate core ASD domains, as these often contribute significantly to overall functioning and quality of life.

  • This includes:

  • Sensory processing

  • Executive functions, memory, attention

  • Motor skills

  • Behavioral/emotional problems

  • Family dynamics

SENSORY PROCESSING

• Assessment Necessity:

  • Given that 78-90% of children with ASD show significant sensory processing issues (e.g., hyper- or hypo-sensitivity to sounds, textures, lights, movement), assessing these is crucial for understanding behavioral impacts and developing appropriate interventions (Baranek, 2002).

  • Tools like Sensory Profile-2 assess sensory responses across environments, aiding in understanding how sensory challenges impact behavior, learning, and daily functioning, and informing sensory-based interventions.

EXECUTIVE FUNCTIONING ASSESSMENT

• Significant for Learning:

  • Children with ASD often exhibit deficits in executive functions (e.g., planning, organization, working memory, inhibitory control, cognitive flexibility) impacting academic performance, social skills, and independent living.

  • Tools including NEPSY-II (A Developmental Neuropsychological Assessment – Second Edition) and BRIEF-2 (Behavior Rating Inventory of Executive Function – Second Edition) assess various executive components like inhibition, planning, cognitive flexibility, and emotional regulation, providing insights into these cognitive challenges.

BEHAVIORAL/EMOTIONAL PROBLEMS

• Assessment Importance:

  • Commonly co-occurring emotional/behavioral disorders (e.g., anxiety disorders, depression, oppositional defiant disorder, ADHD) significantly impair overall functioning and require specific attention within the comprehensive evaluation framework.

  • Tools like Child Depression Inventory-2 (CDI-2) and Revised Children's Manifest Anxiety Scale (RCMAS-2) measure behavioral/emotional concerns within a comprehensive evaluation framework, guiding appropriate mental health interventions.

FAMILY SYSTEM CONSIDERATION

• Assessing Family Impact:

  • Identifying and addressing parenting stress in the context of child behavior can significantly inform the type and extent of additional family support requirements and interventions for the child and family unit.

  • The Parenting Stress Index (PSI) is pivotal for understanding parent-child dynamics, specific sources of stress (e.g., difficult child characteristics, parental distress), and stress-related responses in families of children with ASD, enabling targeted family interventions.

CONCLUSION

• Takeaway:

  • The assessment approach must be comprehensive, integrating diverse tools and perspectives from multiple informants while emphasizing the paramount importance of professional judgment and clinical interpretation over strictly relying on any single assessment tool or cutoff score.

• Forward Look:

  • Case examples in subsequent chapters will illustrate real-world applications of these comprehensive assessment approaches for varied ASD cases, demonstrating how theoretical principles translate into practical diagnostic and intervention planning.