Stereotypy in Autism: The Importance of Function

Area of Science:

• Behavioral science
• Autism research
• Developmental psychology

Background:

• Stereotypy, often termed self-stimulatory behavior, is common in autism.
• Existing definitions may oversimplify the functions of stereotypy.
• A nuanced understanding of stereotypy's purpose is needed.

Purpose of the Study:

• To propose a functional definition of stereotypy in autism.
• To differentiate stereotypy from self-stimulatory behavior.
• To explore both sensory and social reinforcement functions of stereotypy.

Main Methods:

• Review of diagnostic definitions of stereotypy.
• Analysis of behavioral literature on reinforcement contingencies.
• Examination of evidence for sensory and social functions.

Main Results:

• Stereotypy serves diverse functions, including sensory automatic and social reinforcement.
• The term "self-stimulatory behavior" is often inaccurately used interchangeably with "stereotypy."
• Evidence supports multiple, heterogeneous functions for stereotypy in autism.

Conclusions:

• Stereotypy in autism should be defined and categorized by its function, not its form.
• Functional assessment is crucial for developing targeted autism interventions.
• Recognizing the operant and varied nature of stereotypy informs treatment decisions.