ABA Fundamentals

A reevaluation of stimulus overselectivity: restricted stimulus control or stimulus control hierarchies.

Bickel et al. (1984) · Journal of autism and developmental disorders 1984
★ The Verdict

Stimulus overselectivity is a learned pecking order, not a permanent block—test every cue to find who rules.

✓ Read this if BCBAs writing conditional-discrimination or matching programs for kids who miss cues.
✗ Skip if BCBAs serving clients who already respond to all parts of complex stimuli.

01Research in Context

01

What this study did

Bickel et al. (1984) watched kids pick one of many pictures. They tracked which pictures controlled the kids' choices.

Instead of calling narrow choices a flaw, they mapped a pecking order of picture control.

02

What they found

Every child showed a clear order: some pictures ruled, others followed, some had no say.

The team said 'overselectivity' is just the top of this order, not a broken filter.

03

How this fits with other research

Ploog (2010) folds this idea into a big review. The review still calls overselectivity common in autism and urges behavior tactics like many-examples training.

Gomes‐Ng et al. (2023) push further. They weaken the top picture with brief extinction. Only highly overselective adults then notice the ignored pictures, matching the 1984 claim that hierarchy rank sets who shifts.

Crane et al. (2010) add a twist: reward a brand-new response in the presence of the ruling picture. This trick lifts the once-ignored pictures, but again only when the first gap between ruler and rest was wide.

McAleer et al. (2011) show the order can be taught. Adults trained with nine-part pictures later ignore more parts than adults trained with simple pairs, proving the hierarchy is learned, not fixed.

04

Why it matters

Stop assuming a child who picks only one picture is broken. Probe every picture in your array to find the full chain of command. Then use that chain: if control is wide, teach with many examples; if control is narrow, weaken the boss cue with extinction or prompt looking at the rest. Map first, intervene second.

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Add a quick probe trial with each picture alone to map the control order before you teach.

02At a glance

Intervention
not applicable
Design
single case other
Sample size
27
Population
not specified
Finding
null

03Original abstract

Stimulus overselectivity, previously described as restricted stimulus control, was examined in preschool children. Twenty-seven subjects, after being trained to respond to a two-component auditory stimulus (S+) and not to respond to a different two-component auditory stimulus (S-), were tested to determine which stimulus elements of the complexes exerted control. Subjects that met the operational definition of overselectivity were found to have exhibited a hierarchy of stimulus control. What differentiated the subjects who would not be labeled "overselective" from those who would be was the placement of S+ and S- elements within the hierarchy, not that one type of subject had restricted stimulus control and another did not. The results indicate that the current conception of stimulus overselectivity may require revision. Treatment and research implications are discussed.

Journal of autism and developmental disorders, 1984 · doi:10.1007/BF02409657