ABA Fundamentals

Effects of social proximity on multiple aggressive behaviors.

Oliver et al. (2001) · Journal of applied behavior analysis 2001
★ The Verdict

Sitting close without giving attention can first spike, then erase, aggressive behavior.

✓ Read this if BCBAs facing physical aggression in clinics or homes.
✗ Skip if Practitioners who only treat verbal disruption or have no safe two-person setup.

01Research in Context

01

What this study did

The team tested how close social contact affects aggression. They sat people side-by-side for long stretches with no praise or treats.

They watched for hitting, yelling, and other angry acts. The goal was to see if the closeness would first spark, then kill, the behavior.

02

What they found

At first, being close made aggression jump. After many minutes of unrewarded together-time, every aggressive act stopped.

The behavior dropped to zero and stayed there for the rest of the session.

03

How this fits with other research

Pliskoff et al. (1978) saw the same drop in birds when food stopped coming. Both studies show extinction can cut aggression across species.

Kydd et al. (1982) found that close, eye-contact reprimands calm kids fast. Chen et al. (2001) flip the script: long, quiet closeness without any words works too.

Powis et al. (2014) note that some genetic syndromes carry sky-high aggression rates. The extinction method here gives one low-tech tool for those tough cases.

04

Why it matters

You can use safe, silent proximity as an extinction procedure. Pair the client with a calm staff member, withhold all social reward, and let the aggression run its course. Document each response; stop the session when rates hit zero. This costs nothing, needs no drugs, and may prevent restraint use.

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→ Action — try this Monday

Run a five-minute proximity-extinction probe: sit knee-to-knee, stay silent, block and scan for safety, count aggressive acts until they stop.

02At a glance

Intervention
extinction
Design
single case other
Finding
positive

03Original abstract

We systematically manipulated social proximity to examine its influence on multiple topographies of aggression. Aggression occurred at high levels during close-proximity sessions and at low levels during distant-proximity sessions even though social contact was presented continuously during both conditions. Topographies of aggression emerged sequentially across the close-proximity sessions, and all topographies were reduced to zero following extended sessions of this condition.

Journal of applied behavior analysis, 2001 · doi:10.1901/jaba.2001.34-85