The Repetitive Behavior Scale-Revised: independent validation in individuals with autism spectrum disorders.

The team checked if three parent checkouts work for toddlers and preschoolers at risk for intellectual or developmental delays. They gave the Aberrant Behavior Checklist (ABC), Behavior Problems Inventory-01 (BPI-01), and Repetitive Behavior Scale-Revised (RBS-R) to the caregivers.

Kids were one to five years old. Most had autism, Down syndrome, or global delay. Parents filled the forms twice, two weeks apart, so the researchers could test reliability.

All three scales scored in the “good” to “excellent” range for internal consistency and test-retest reliability. Each scale also showed moderate to strong correlations with clinician ratings, showing they measure real behavior.

ABC, BPI-01, and RBS-R did not overlap completely. Each caught unique problems the others missed. Using all three gave a fuller picture of challenging and repetitive behaviors.

Weiss et al. (2001) introduced the 52-item BPI-01 six years earlier. Kleinert et al. (2007) now confirm it works in very young kids, extending the original adult work downward.

Rojahn et al. (2012) later trimmed the BPI-01 to a 30-item short form that keeps the same three domains. Their BPI-S almost perfectly matches the long form, so you can save time without losing accuracy.

Lord et al. (1997) validated a different autism scale, the BSE-R, and also reported good reliability. Together these papers show a pattern: revised behavior checklists keep getting shorter while staying solid.

If you assess early intervention cases, keep all three forms in your kit. ABC flags irritability and hyperactivity, BPI-01 captures self-injury and aggression, and RBS-R picks up stereotypy and rigidity. Rotating them takes ten extra minutes but lowers the chance you miss a critical target behavior when you write the behavior plan.