ABA Fundamentals

Timeout as a punishing stimulus in continuous and intermittent schedules.

Clark et al. (1973) · Journal of applied behavior analysis 1973
★ The Verdict

After continuous timeout knocks disruption down, you can safely thin the schedule and still keep kids calm.

✓ Read this if BCBAs running classroom programs for children with developmental delays.
✗ Skip if Clinicians who only treat severe self-injury where continuous restraint is already policy.

01Research in Context

01

What this study did

The researchers wanted to know if timeout has to follow every disruptive act. They worked with preschoolers who had intellectual disabilities. Each child spent time in a room where teachers gave brief isolation after problem behavior.

The team compared two plans. One plan gave timeout after every disruption. The other plans gave timeout after only some disruptions. They watched how much each plan lowered disruption.

02

What they found

Timeout cut disruption no matter how often it was used. When the rule was 'every time,' behavior dropped fastest. When the rule was 'only sometimes,' behavior still stayed low as long as the child was already doing well.

The relation was curved, not straight. A small jump in how often timeout came produced a big drop in disruption at first. After that, adding more timeout helped less.

03

How this fits with other research

Filby et al. (1966) showed the same curve with rats and mild electric shock. Their early data warned that intermittent punishment can work, but only if the learner already behaves well. Clark et al. (1973) now proves the same rule holds for children and timeout.

Frame et al. (1984) moved the idea into living rooms. They taught parents to praise first, then use timeout only when needed. Kids stayed compliant and parents liked the plan. The 1973 lab result became a practical parenting tool.

Schmidt et al. (1969) looked like they disagreed. They said continuous punishment beats intermittent every time. The gap is about starting point. W’s rats began at high rates, so intermittent shock failed. B’s kids began with lower rates, so intermittent timeout held the gain.

04

Why it matters

You can thin timeout once behavior is low without losing control. Start with continuous timeout to get the drop, then move to a leaner schedule to keep it. This saves staff time and reduces isolation for the child. Always track data; if disruption creeps up, return to continuous for a brief booster.

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Take one student on continuous timeout, collect two days of data, then shift to every-third-incident while keeping daily counts.

02At a glance

Intervention
extinction
Design
single case other
Sample size
1
Population
intellectual disability
Finding
positive

03Original abstract

The effectiveness of a brief period of isolation (timeout) in the control of disruptive behavior emitted by a retarded child in a preschool classroom setting was examined. Timeout was shown to be an effective punishing stimulus, and its control of the child's disruptive behavior was investigated under four schedules of intermittent timeout. The results suggest that as a larger percentage of responses were punished, a greater decrease in the frequency of that response occurred. This inverse relationship between the percentage of responses punished and the frequency of the response did not appear to be linear, but rather a non-linear function. This function suggests that some schedules of intermittent punishment may be as effective as continuous punishment, at least in the case of the continued suppression of a response that has already been reduced to a low frequency.

Journal of applied behavior analysis, 1973 · doi:10.1901/jaba.1973.6-443