ABA Fundamentals

Social facilitation of responses during a stimulus paired with electric shock.

Hake et al. (1967) · Journal of the experimental analysis of behavior 1967
★ The Verdict

Peer presence can immediately cut fear-based response shutdown.

✓ Read this if BCBAs who use error-correction or extinction procedures that sometimes freeze clients.
✗ Skip if Clinicians working only in 1:1 settings where peer models are impossible.

01Research in Context

01

What this study did

Hake et al. (1967) worked with two pigeons at a time. Both birds were trained to peck a key for food on a fixed-ratio schedule.

A red light then came on. That light meant a mild electric shock would soon follow. The shock made the lone bird stop pecking.

The test was simple. Keep the warning light and shock, but add a second pigeon. Would the first bird still freeze?

02

What they found

When the partner pigeon was present, the shocked bird kept pecking. The warning light no longer shut the behavior down.

Social facilitation beat conditioned suppression. Peer presence alone reduced fear enough to keep the food schedule running.

03

How this fits with other research

LYOSLOANE (1964) showed that timing matters. A shock cue early in a long ratio stops the bird; late in the ratio the bird keeps going to get the food pellet. F et al. add a social factor that can override even early-cue shutdown.

McIntire et al. (1987) stretched the time window. They found that one daily shock session can suppress appetite behavior for hours before and after. F et al. show the opposite: immediate social contact can shrink suppression right now.

WALLER et al. (1962) used drugs to lift suppression. A dose of amphetamine made shocked pigeons peck again. F et al. got the same lift with no drug—just another pigeon nearby.

04

Why it matters

If a client stops working when a hard task signals correction, try adding a peer. Let the learner see a classmate doing the same work. The sight alone may keep responses flowing and reduce avoidance. No extra tokens, no drugs—just social facilitation.

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→ Action — try this Monday

Place the learner at a table with one peer doing the same task before you present the tough trial.

02At a glance

Intervention
other
Design
single case other
Finding
positive

03Original abstract

Key-pecking responses of a pigeon were maintained by a variable-interval schedule of food reinforcement. The responses were suppressed during the occasional presentation of a warning stimulus paired with electric shock. The presence of a second pigeon emitting the same response for food reinforcement reduced the suppression that otherwise occurred during the warning stimulus when the second pigeon was absent. These results reveal that the social facilitation phenomenon can be used to restore behavior that is suppressed by a conditioned aversive stimulus.

Journal of the experimental analysis of behavior, 1967 · doi:10.1901/jeab.1967.10-387