1.

Individual displays continual deficiencies in various areas of communication and social interaction, including the following: • Social-emotional reciprocity • Nonverbal communication • Development and maintenance of relationships.

2.

Individual displays significant restriction and repetition in behaviors, interests, or activities, including two or more of the following: • Exaggerated and repeated speech patterns, movements, or object use • Inflexible demand for same routines, statements, and behaviors • Highly restricted, fixated, and overly intense interests • Over- or underreactions to sensory input from the environment.

3.

Individual develops symptoms by early childhood.

4.

Individual experiences significant impairment.

(Information from: APA, 2013.)