ABA Fundamentals

The application of sensory change to reduce stereotyped behavior.

Mason et al. (1990) · Research in developmental disabilities 1990
★ The Verdict

A simple plastic ring cut hand stereotypy by at least a large share for three kids with ID, often without extra treats.

✓ Read this if BCBAs working with children or teens who flap, rub, or wave their hands.
✗ Skip if Practitioners serving clients whose stereotypy is vocal, whole-body, or already near zero.

01Research in Context

01

What this study did

Three kids with intellectual disability kept rubbing or flapping their hands. The team gave each child a short plastic ring to hold. Sometimes the ring came with praise or snacks. Sometimes it was just the ring. The researchers kept adding and removing the ring in an ABAB design to see if hand stereotypy would drop.

02

What they found

Hand rubbing fell right away in every child. The lowest drop was a large share. One child stayed calm for four hours with only the ring and no extra treats. When the ring was taken away, stereotypy came back. When it returned, the behavior dipped again. The ring alone worked almost as well as ring plus snacks.

03

How this fits with other research

Rana et al. (2024) shows that preschoolers with autism often have sensory issues. Iwata et al. (1990) proves you can use those same sensory tools to cut stereotypy, not just describe it. The two studies link diagnosis to treatment across ID and ASD groups.

Day et al. (2021) placed Velcro mittens on babies with Down syndrome to spark reaching. Like the rings, the mittens changed how hands felt and moved the child toward a new goal. One study builds skill; the other removes problem behavior. Same sensory trick, different aim.

Briggs et al. (2024) lists ways to train staff quickly. You could use their BST shortcuts to teach aides how to give the ring, check data, and fade the cue without long workshops.

04

Why it matters

You now have a low-cost, non-restrictive option for hand stereotypy. No blocking, no restraint, no extra meds. Try handing the client a small sensory item first. If stereotypy drops, keep the item and thin reinforcement. If it returns, you still have the full extinction or punishment plan in your pocket. This study gives you a gentle first step that can spare more intrusive tactics later.

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Place a small smooth object in the client’s hand, count stereotypy for 10 minutes, and compare to baseline.

02At a glance

Intervention
extinction
Design
reversal abab
Sample size
3
Population
intellectual disability
Finding
positive

03Original abstract

A combined reversal and multiple baseline design was utilized to assess reduction of repetitive hand movements for three severely mentally retarded children. Stereotypy was assessed during baseline (reinforcement for on task behavior) and sensory change (rings and reinforcement, rings, and faded rings) conditions. The results indicated sensory change effectively reduced the target responses. These results were durable up to 4 hours. We conclude that the procedure used in this study is a non-intrusive intervention that is an extension of the current literature pertaining to sensory extinction.

Research in developmental disabilities, 1990 · doi:10.1016/0891-4222(90)90012-w