All are features of autistic disorder except –
**Core Concept**
Autistic disorder, also known as Autism Spectrum Disorder (ASD), is a complex neurodevelopmental disorder characterized by impaired social interaction, communication, and repetitive behaviors. The underlying pathophysiology involves abnormalities in brain structure and function, particularly in regions responsible for social cognition and communication.
**Why the Correct Answer is Right**
Autistic disorder is characterized by several distinct features, including impaired social interaction, such as difficulty initiating or maintaining conversations, and understanding nonverbal cues like facial expressions and body language. Another key feature is communication impairment, including delayed or absent language development, and repetitive behaviors, such as hand flapping, body rocking, or other self-soothing behaviors. These features are often accompanied by sensory processing difficulties and restricted interests.
**Why Each Wrong Option is Incorrect**
**Option A:** Social anxiety is a common comorbidity in autistic disorder, but it is not a feature of the disorder itself.
**Option B:** Delays in language development are a hallmark of autistic disorder, making this option incorrect.
**Option C:** Stereotypic behaviors, such as hand flapping, are a characteristic feature of autistic disorder.
**Clinical Pearl / High-Yield Fact**
It's essential to recognize that autistic disorder is a spectrum disorder, and individuals may exhibit varying degrees of impairment in social interaction, communication, and repetitive behaviors. A comprehensive diagnostic evaluation, including behavioral observations and standardized assessments, is necessary to accurately diagnose and differentiate autistic disorder from other neurodevelopmental disorders.
**Correct Answer: C. Stereotypic behaviors, such as hand flapping, are a characteristic feature of autistic disorder.**