Practitioner Development

Conflicting approaches: operant psychology arrives at a primate laboratory.

Dewsbury (2003) · The Behavior analyst 2003
★ The Verdict

Early behavior analysts had to fight for cages, food schedules, and even the right words before operant methods could live inside primate labs.

✓ Read this if BCBAs who train staff, write protocols, or share space with other disciplines.
✗ Skip if Clinicians looking for direct intervention data.

01Research in Context

01

What this study did

Dewsbury (2003) tells the story of what happened when operant psychologists first walked into primate labs in the 1950s. The paper maps the turf battles over who could run experiments, what gear to use, and even what to call the work.

It is not a lab study. It is a history piece built from memos, meeting notes, and old grant files.

02

What they found

The newcomers wanted food deprivation, lever boxes, and bar-press charts. The old-guard primatologists wanted rich cages, social groups, and field-style names. The clash slowed projects and shaped early ABA gear choices.

Names mattered. Calling a task "bar pressing" sounded cold. Calling it "manipulative play" sounded softer. The paper shows how language choices helped operant methods sneak into animal labs.

03

How this fits with other research

Phillips (1968) and Morse et al. (1966) show the flip side: once the turf war cooled, the same labs raced to build faster recorders and snap-lead circuits. The conflict paper explains why the gadgets were needed; the tech papers show how they worked.

Smith et al. (2011) picks up the story later. After the labs accepted operant tools, Lovaas moved the same tools from monkeys to children with autism. The clash in Dewsbury (2003) set the stage for that jump.

Mead Jasperse et al. (2025) and Kelly et al. (2021) look forward, not back. They ask how today’s BCBAs can write ethical rules that avoid new turf wars. Dewsbury (2003) warns that fights over method and naming still slow science.

04

Why it matters

When you write a protocol, pick words your team already uses. When you ask for new gear, show how it helps everyone, not just the behavior wing. The early fights in Dewsbury (2003) teach that small choices—deprivation levels, lever names, who signs the cage card—can speed up or stall a whole program. Share toys, share language, share credit.

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Rename one procedure in your plan with words the rest of the team already uses.

02At a glance

Intervention
not applicable
Design
narrative review
Population
not specified
Finding
not reported

03Original abstract

During a brief period, from 1955 to 1957, behavior analysts, primarily Charles Ferster, Roger Kelleher, and John Falk, conducted research on chimpanzees at the Yerkes Laboratories of Primate Biology in Orange Park, Florida. This was a time of conflict between operant conditioners and more traditional experimental psychologists at the national level, and there was a similar conflict at the local level in Orange Park. The principal overt issues concerned the use of deprivation procedures, the apparatus utilized, and the naming of animals, although more fundamental differences probably set the occasion for the disputes. The conflicts in Orange Park can be seen as a microcosm of the broader conflicts that occurred during a period when the operant approach was being extended and applied more broadly than before.

The Behavior analyst, 2003 · doi:10.1007/BF03392080