ABA Fundamentals

Time allocation and negative reinforcement.

Baum (1973) · Journal of the experimental analysis of behavior 1973
★ The Verdict

The matching law covers negative reinforcement—organisms allocate time in proportion to the relief they get.

✓ Read this if BCBAs treating escape-maintained behavior in schools or clinics.
✗ Skip if Practitioners who only treat skill deficits with no problem behavior.

01Research in Context

01

What this study did

Pigeons pecked two keys. One key gave a timeout from mild shock. The other key gave a longer timeout.

The birds could hop between keys at any time. Researchers logged how many minutes the birds spent on each side.

They wanted to know if the matching law works for negative reinforcement—relief from something bad.

02

What they found

Time on each key matched the ratio of timeouts earned. More relief meant more time.

The same simple rule that predicts food choices also predicts how pigeons seek relief.

03

How this fits with other research

Shimp et al. (1971) showed matching with food two years earlier. Wilkie (1973) proved the rule still holds when the reinforcer is escape, not food.

Hamm et al. (1978) later tested both shock relief and food in the same birds. They got matching for both, backing up the unified view.

Oliver et al. (2002) moved the idea to kids. Severe problem behavior followed the same law—proportion of hits matched proportion of attention delivered.

Matson et al. (2004) showed that noncontingent reinforcement can shift behavior ratios in the lab, reminding us that free attention also obeys matching.

04

Why it matters

If a client keeps leaving work and going to the break corner, check the relief ratio. Each escape minute may be strengthening the next break. You can weaken the pull by making the work side richer—give more help, praise, or tiny breaks for staying. Flip the numbers and the child will flip their time.

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→ Action — try this Monday

Count how many minutes of escape you give today, then add brief scheduled breaks for on-task behavior so the math favors staying.

02At a glance

Intervention
not applicable
Design
single case other
Sample size
4
Population
other
Finding
positive

03Original abstract

Pigeons' standing on one or the other side of a chamber was reinforced with timeout from electric shock on two concurrent variable-interval schedules. For two pigeons, the ratio of time spent on the left to time spent on the right approximately matched the ratio of timeouts obtained on the left to timeouts obtained on the right. The data of two other birds deviated from this relation, although in opposite directions. Overall, the results suggest that reduction in rate of electric shock plays a role in behavioral allocation analogous to that played by rate of positive reinforcement. It appears possible to describe aversive control and positive control within the same conceptual framework-that provided by the matching relation.

Journal of the experimental analysis of behavior, 1973 · doi:10.1901/jeab.1973.20-313