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Updated: Mar 20, 2026

Novel Object Exploration as a Potential Assay for Higher Order Repetitive Behaviors in Mice
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Methodological considerations when assessing restricted and repetitive behaviors and aggression.

A J Keefer1, L Kalb2, M O Mazurek3

  • 1Center for Autism and Related Disorders, Kennedy Krieger Institute, 3901 Greenspring Avenue, Baltimore, MD 21211, USA.

Research in Autism Spectrum Disorders
|May 31, 2016
PubMed
Summary

Investigating autism spectrum disorder (ASD), this study found a small link between restricted, repetitive behaviors (RRSBI) and aggression. Informant and assessment methods significantly influenced these findings, highlighting needs for targeted interventions.

Keywords:
AggressionMethodologyRepetitive behavior

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Area of Science:

  • Neurodevelopmental disorders
  • Child and adolescent psychology
  • Behavioral science

Background:

  • Aggression and restricted, repetitive, and stereotyped behaviors and interests (RRSBI) are common in autism spectrum disorders (ASD).
  • Understanding the relationship between RRSBI and aggression is crucial for effective interventions.
  • Methodological variations can impact research findings in ASD.

Purpose of the Study:

  • To examine methodological factors influencing the RRSBI-aggression relationship in ASD.
  • To assess the effects of informant, assessment method, and aggression phenotype.
  • To identify strategies for optimizing future research and interventions.

Main Methods:

  • A multi-method, multi-informant analysis model was used.
  • Data from 2648 children and adolescents with ASD were analyzed.
  • Effects of informant, assessment method, and aggression phenotype were evaluated.

Main Results:

  • A significant, small relationship was found between RRSBI and aggression (p < .05).
  • Heterogeneity in estimates was significant, with larger effect sizes from teacher reports and broad aggression phenotypes.
  • Informant differences accounted for twice the variance compared to assessment method differences.

Conclusions:

  • Methodological choices, particularly informant, significantly impact the observed relationship between RRSBI and aggression in ASD.
  • Future research should standardize methods to enhance reliability and validity.
  • Findings support the development of targeted interventions for aggression in youth with ASD.