Using eye gaze to identify reinforcers for individuals with severe multiple disabilities.

The team ran a paired-choice preference test for clients with severe multiple disabilities.

Instead of reaching or pointing, clients picked items by looking longer at one picture.

An ABAB reversal design proved the chosen items really worked as reinforcers.

Eye-gaze duration matched later reinforcer strength.

When staff delivered the gazed-at items, clients worked harder.

When items were removed, responding dropped, showing true reinforcement.

Duker et al. (1996) first showed high-preference items beat middle or low items. Weissman-Fogel et al. (2015) now show the same rule holds when the "choice" is just longer looking.

Brodhead et al. (2019) got valid rankings from videos clients never touched. Together the papers say: you can drop the access step and still predict what will reinforce.

Houck et al. (2024) took the logic further, using a mask preference test to help adults with ID wear face masks. Eye gaze, video, or real objects — the method changes, the principle stays.

If a client can’t speak, reach, or touch, you can still find reinforcers in under five minutes. Sit eye-level, hold up two pictures, and time where the eyes rest. The longer stare tells you the stronger reinforcer. Use that item first in teaching, then cycle through other high-gaze picks to keep sessions fresh.