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Difficulty: MediumChildhood and Neurodevelopmental Disorders

A kindergarten teacher raises concerns about a 5-year-old boy who recently transferred to her classroom. The child rarely initiates play with peers, often avoids eye contact when addressed, and frequently flaps his hands when excited. The school psychologist and pediatrician collaborate to evaluate him for Autism Spectrum Disorder (ASD). When distinguishing ASD from an isolated speech delay or global developmental delay, which of the following findings would specifically fulfill the core diagnostic criteria for ASD? (Select all that apply)

  1. Consistent lack of joint attention, such as failing to point at objects of interest to share them with othersAnswer
  2. Extreme emotional distress and tantrums when the standard classroom routine is slightly alteredAnswer
  3. C
    Inability to copy a triangle or independently dress himself
  4. D
    Expressive vocabulary limited to approximately 30 words
  5. Highly restricted preoccupation with the exact scheduling of local train departuresAnswer

Answer

The findings that specifically support an ASD diagnosis are the consistent lack of joint attention, extreme emotional distress when routines are altered, and highly restricted preoccupations with train schedules.
Autism Spectrum Disorder is characterized by specific qualitative impairments rather than just delayed milestone acquisition. To establish the diagnosis, a patient must demonstrate persistent deficits in social communication (such as a lack of joint attention) AND restricted, repetitive patterns of behavior, interests, or activities (such as an inflexible adherence to routines and highly fixated interests). These specific behavioral features distinguish ASD from isolated developmental delays.

Step-by-Step Solution

1
Analyze the core diagnostic criteria for Autism Spectrum Disorder (ASD) according to the DSM-5.
ASD requires two main symptom domains: (1) persistent deficits in social communication and social interaction, and (2) restricted, repetitive patterns of behavior, interests, or activities.
Establishing the required diagnostic domains is the first step in differentiating ASD from other neurodevelopmental disorders.
2
Evaluate the clinical findings against the social communication domain.
A consistent lack of joint attention (e.g., not pointing to share an interest) is a hallmark deficit in social-emotional reciprocity and nonverbal communication specific to ASD.
This qualitative impairment distinguishes ASD from pure speech or language disorders where children still attempt to communicate nonverbally.
3
Evaluate the clinical findings against the restricted/repetitive behaviors domain.
Extreme distress with routine changes (insistence on sameness) and fixated interests (preoccupation with train schedules) specifically fulfill the requirements for this second diagnostic domain.
These behaviors are highly specific to ASD and are not typical features of isolated developmental delays.
4
Differentiate the core ASD features from standard milestone delays.
Inability to copy shapes or having a limited vocabulary represent delayed motor and language milestones, respectively.
While children with ASD may have concurrent milestone delays, quantitative delays alone point toward a global developmental delay and do not fulfill the specific qualitative behavioral criteria required for an ASD diagnosis.

Key Concept

Diagnostic criteria for Autism Spectrum Disorder
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Topics

Childhood and Neurodevelopmental Disorders

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