**Question:** Which of the following is not a central characteristic of childhood autism?

A. Sensory Hypersensitivity
B. Presence of associated medical conditions
C. Developmental delays in multiple domains
D. Absence of purposeful eye contact

**Core Concept:** Autism is a neurodevelopmental disorder that affects social interaction, communication, and behavior. It is characterized by a combination of symptoms, including sensory hypersensitivity, presence of associated medical conditions, developmental delays in multiple domains, and the absence of purposeful eye contact.

**Why the Correct Answer is Right:** Purposeful eye contact is essential for social interaction and communication development. In autism, individuals often demonstrate impaired eye contact, making it a non-central characteristic of childhood autism.

**Why Each Wrong Option is Incorrect:**

A. Sensory hypersensitivity is a common symptom in autism, characterized by oversensitivity to sensory stimuli. It is a relevant aspect of the disorder.
B. Associated medical conditions are often present in autism but are not exclusive to it. Some examples include seizures, gastrointestinal issues, and sleep disturbances.
C. Developmental delays in multiple domains, including language, social interaction, and motor skills, are key features of autism and are not a non-central characteristic.

**Clinical Pearl:** Understanding the core symptoms of autism is crucial for accurate diagnosis and appropriate intervention for affected individuals. While autism encompasses a wide range of symptoms, it is essential to recognize the presence of purposeful eye contact as a non-central characteristic. This knowledge helps in differentiating autism from other developmental disorders or conditions with overlapping symptoms.

**Correct Answer:** D. Absence of purposeful eye contact