Which disorder is characterized by obsessive interest in a single object or topic?

The correct answer refers to Autism Spectrum Disorder (ASD), which is indeed characterized by intense and focused interests in specific subjects or activities. Individuals with ASD often display a pattern of behavior that includes a deep and obsessive interest in a single object, topic, or activity. This can manifest as a strong fixation where they may spend extensive amounts of time learning about, discussing, or engaging with their specific interest.

For example, a child with ASD might have an extraordinary fascination with trains, leading to a great depth of knowledge about different types of trains, their histories, and operations. This characteristic is part of the broader diagnostic criteria for ASD and helps differentiate it from other disorders.

Understanding this unique focus is essential for developing effective educational and behavioral strategies for individuals with ASD. Recognizing their interests can also facilitate engagement and learning opportunities.