Which term was not previously used when referencing autism?

• A. Autistic spectrum disorder
• B. Childhood disintegrative disorder
• C. Cognitive disorder
• D. Pervasive developmental disorder

Answer: (C)

The term "cognitive disorder" is not specifically associated with autism in the historical context of how various autism-related conditions were defined. While individuals with autism may also have cognitive challenges, the term itself does not directly reference autism or its spectrum of disorders.

In contrast, "autistic spectrum disorder," "childhood disintegrative disorder," and "pervasive developmental disorder" all pertain directly to the classification and understanding of autism. Both "pervasive developmental disorder" and "childhood disintegrative disorder" were used in earlier diagnostic criteria to describe conditions on the autism spectrum, and "autistic spectrum disorder" is a more recent consolidation of various diagnoses under one umbrella term. Thus, the connection to autism is clear for these terms, making "cognitive disorder" the option that does not fit in this context.