Further analysis of subtypes of automatically reinforced SIB: A replication and quantitative analysis of published datasets

The team pulled 49 published datasets on self-injury that had no social payoff.

They sorted each case into three subtypes using a simple test: give free toys or music during a 5-minute break.

If the SIB stopped or dropped a lot, it went in Subtype-1. If it kept going, Subtype-2.

Subtype-1 cases usually calmed down when rich reinforcement was present.

Those same cases later responded to reinforcement-only treatments.

Subtype-2 cases kept hurting themselves even with free fun stuff, so they needed stronger plans like sensory toys plus blocking or RIRD.

Wunderlich et al. (2022) looked at the same three subtypes but for harmless stereotypy. They found the split did NOT predict treatment success, so don’t use this rule for hand-flaps or spinning.

Baranek et al. (2005) already showed that automatic reinforcement keeps most stereotypy alive and brief enrichment works short-term; Hagopian adds a clear test to decide who can skip the heavy artillery.

Callahan et al. (2023) later showed RIRD in multiple schedules slashes stereotypy fast; Hagopian’s subtype test tells you when you might need that extra punch.

Next time you run an alone or leisure condition during an FA, watch the clock. If SIB almost stops, plan reinforcement first. If it keeps roaring, line up blocking, sensory matched items, or RIRD from day one. This five-minute check saves weeks of failed gentle plans.