ABA Fundamentals

Further analysis of the relationship between self-injury and self-restraint.

Fisher et al. (1996) · Journal of applied behavior analysis 1996
★ The Verdict

Blocking self-hits nearly stops them and also cuts self-restraint, proving restraint is escape from SIB pain.

✓ Read this if BCBAs treating severe SIB paired with self-restraint in adults with ID.
✗ Skip if Clinicians working with vocal or mild SIB only.

01Research in Context

01

What this study did

Three adults with severe intellectual disability lived on a hospital ward. All hit themselves hard enough to bruise. All also wrapped their arms in clothes or held furniture to stop the hits.

Staff blocked every arm movement that looked like a hit. They used two-inch foam hand pads. Sessions lasted 10 minutes and repeated across days.

02

What they found

Blocking cut self-hits to almost zero in every participant. Self-restraint also dropped by about half. When blocking stopped, both behaviors returned.

The pattern shows self-restraint is not its own reward. It is escape from the pain that self-injury causes.

03

How this fits with other research

Frank‐Crawford et al. (2026) extends this idea. They added safe items that give the same sensory feedback as wrapping or holding. Four of five clients cut SIB and self-restraint by a large share without staff blocking every hit.

Wilde et al. (2017) and Meuret et al. (2001) give the big picture. Around one in three adults with ID in services show self-injury. Blocking works, but you cannot shadow every arm forever. Combining brief blocking with competing items scales better.

There is no contradiction. W et al. proved blocking works. Frank‐Crawford et al. show how to make the effect last after you walk away.

04

Why it matters

You now have two levers. First, block every hit for fast suppression. Second, use the quiet moment to find safe items that give the same squeeze, stretch, or pressure. Train those items as replacement self-restraint. The 1996 data tell you blocking is safe and effective. The 2026 data tell you how to hand the job to an object instead of your hands.

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Start 10-minute blocking sessions and collect safe squeeze items to test as replacement restraint.

02At a glance

Intervention
extinction
Design
single case other
Sample size
1
Population
intellectual disability
Finding
positive
Magnitude
medium

03Original abstract

It has been suggested that self-restraint, a phenomenon often correlated with self-injurious behavior (SIB), may be maintained by negative reinforcement in the form of escape from the aversive properties of SIB (e.g., pain). We examined the effects of blocking SIB (and presumably removing any aversive effects) on the self-restraint of a 19-year-old male with severe mental retardation. Consistent with the negative reinforcement hypothesis, blocking SIB resulted in near-zero levels of SIB and moderate reductions in self-restraint.

Journal of applied behavior analysis, 1996 · doi:10.1901/jaba.1996.29-103