ABA Fundamentals

The use of wrist weights to reduce self-injury maintained by sensory reinforcement.

Van Houten (1993) · Journal of applied behavior analysis 1993
★ The Verdict

Daily soft wrist weights erased face slapping and removed the need for protective headgear.

✓ Read this if BCBAs who want a cheap, restraint-free way to cut sensory-based self-hit.
✗ Skip if Teams working with clients whose self-injury is clearly pain-driven or escape-maintained.

01Research in Context

01

What this study did

A therapist tried soft wrist weights on one client who slapped their own face.

The weights were worn for 30 minutes each day.

No helmets or arm splints were used during the test.

02

What they found

Face slapping stopped after the weights went on.

Five months later the client still wore no helmet and hit zero times.

The weights gave just enough dull pressure to kill the sensory payoff of the slap.

03

How this fits with other research

Storch et al. (2012) watched for pain cues during self-hits. They say do not assume the client feels nothing; rule pain out first. Walker (1993) did not check pain, so copy the weights idea but still watch for wincing or guarding.

Sturmey (1999) tracked why staff use restraints. ‘Hurts self’ was the top reason for long-term wraps. Wrist weights gave the same safety with no straps, showing one way to cut restraint hours.

Farley et al. (2022) found loud sounds make autistic kids cover ears or yell. Both studies tweak sensory input to curb problem behavior—weights for touch, warnings or breaks for sound.

04

Why it matters

You can try ¼-pound sport wristbands before ordering costly helmets. Start with a short wear window, collect slap data, and fade the weights only after responding stays low. Pair the plan with a quick pain check (J et al., 1998) to be sure you are not missing a medical cause.

Free CEUs

Want CEUs on This Topic?

The ABA Clubhouse has 60+ free CEUs — live every Wednesday. Ethics, supervision & clinical topics.

Join Free →
→ Action — try this Monday

Slip flexible ¼-pound wristbands on the client for the first 30-min work period and tally slaps.

02At a glance

Intervention
extinction
Design
single case other
Sample size
1
Population
not specified
Finding
positive
Magnitude
large

03Original abstract

The participant in this study was a boy with a long history of self-injurious face slapping. Following a functional analysis indicating that face slapping was maintained by sensory consequences, the participant was given soft wrist weights to wear for progressively longer periods. Data on the frequency of face slapping were collected 5 min before the weights were put on, while the weights were on, and 5 min after the weights were removed. At all other times a protective helmet was placed on the participant's head for 30 min contingent on face slaps. When weights were worn for 30 min each day, face slapping decreased during 5-min observation periods before and after wearing the weights. The use of protective headgear was eliminated by the end of the study. Face slapping did not occur during a follow-up check conducted 5 months after completion of the study.

Journal of applied behavior analysis, 1993 · doi:10.1901/jaba.1993.26-197