Assessment & Research

Effects of therapist‐worn protective equipment during functional analysis of aggression

Oropeza et al. (2018) · Journal of Applied Behavior Analysis 2018
★ The Verdict

Protective equipment during an aggression FA does not change the function you find, so wear it and stay safe.

✓ Read this if BCBAs who run or supervise FAs with clients who hit, bite, or throw objects.
✗ Skip if Practitioners working only with vocal or mild disruptive behavior.

01Research in Context

01

What this study did

Oropeza et al. ran two functional analyses at the same time. One FA had the therapist wear face shields, arm guards, and thick jackets. The other FA had no gear.

They switched the sessions back-to-back. Each client got both types in random order. The team recorded how often and how hard aggression hit.

02

What they found

The graphs landed on top of each other. Escape, attention, or automatic functions looked the same whether the therapist wore pads or plain clothes.

No client needed different treatment plans. The gear did not create or hide any behavior patterns.

03

How this fits with other research

McConnell et al. (2020) also changed the FA setting. They tested disruptive behavior in a real dental chair and still found clear functions. Both studies show you can bend FA conditions for safety or context without losing validity.

Frank-Crawford et al. (2026) asked if latency-based CSA gives the same answer as rate-based CSA. Like Oropeza, they compared two ways to collect data and found the main result holds. These papers form a set: small procedural tweaks do not break the assessment.

Hoffmann et al. (2025) surveyed experts who warn against always using the classic FA format. Their advice lines up here: if safety gear lets you run the FA, use it. The function stays true.

04

Why it matters

You no longer need to choose between staff safety and a clean FA. Suit up, run the analysis, and trust the outcome. This small change can cut injury risk and reduce session cancellations, speeding up treatment for clients with severe aggression.

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Add face shield and arm guards to your FA kit and run the standard conditions without worry.

02At a glance

Intervention
functional analysis
Design
alternating treatments
Population
not specified
Finding
null

03Original abstract

The effects of therapist-worn protective equipment (PE) on functional analysis (FA) outcomes for aggression were evaluated. Independent FAs with and without PE were conducted concurrently. Both FAs showed the same function of aggression for all participants. These results suggest that therapists may wear PE during FAs of aggression to reduce risk without altering the interpretation of the analysis.

Journal of Applied Behavior Analysis, 2018 · doi:10.1002/jaba.457