ABA Fundamentals

The effect of stimulus salience on over-selectivity.

Leader et al. (2009) · Journal of autism and developmental disorders 2009
★ The Verdict

Stop paying the over-selected cue and the ignored one will take over.

✓ Read this if BCBAs who run discrimination or listener programs with autistic kids who fixate on one feature.
✗ Skip if Clinicians working on pure vocal or gross-motor skills where stimulus over-selectivity is rare.

01Research in Context

01

What this study did

Geraldine et al. (2009) worked with kids with autism who were over-selective. The team first let the child pick one color that always won. Then they stopped paying off that color. They watched to see if the ignored color would now guide choices.

02

What they found

When the winning color no longer paid off, kids started picking the other color. The once-ignored cue took control. This shows you can fix over-selectivity by removing the strong cue.

03

How this fits with other research

Murphy et al. (2014) got the same kind of shift, but they did it by making the right answer flash instead of killing the wrong one. Both studies prove that tweaking salience re-balances stimulus control in autism.

Rincover et al. (1975) first showed that autistic kids lock onto one cue and fail to transfer. Geraldine et al. give the next step: extinguish that locked cue so new cues can rule.

McGonigle et al. (2014) looked at social scenes and found that high-interest objects pull gaze away from faces. The color study and the face study both show that high-salience items steal attention; the fix is to tone down or remove the thief.

04

Why it matters

If your learner only responds to one part of a task, stop reinforcing that part. Withhold the reward tied to the over-selected cue for a few trials. The child will start noticing the other cues you want to teach. Use this trick during matching, sorting, or listener-responding programs when one feature blocks learning.

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→ Action — try this Monday

In your next matching session, if the child only picks red, turn off reinforcement for red for five trials and reinforce any touch of the other colors.

02At a glance

Intervention
extinction
Design
single case other
Population
autism spectrum disorder
Finding
positive

03Original abstract

The influence of stimulus salience on over-selective responding was investigated in the context of a comparator theory of over-selectivity. In Experiments 1 and 2, participants were presented with two cards, each displaying two colors. In comparison to matched control participants, participants with Autistic Spectrum Disorder (ASD) demonstrated more over-selectivity, which increased when the stimuli differed in salience. In Experiment 3, the over-selected color was extinguished, and the previously under-selected color emerged to control behavior. The results suggest that stimuli of different salience may trigger over-selectivity in individuals with ASD, and provide preliminary support that this may be due to the action of an over-sensitive comparator mechanism functioning at the retrieval level of processing.

Journal of autism and developmental disorders, 2009 · doi:10.1007/s10803-008-0626-y