Training to increase safe tray carrying among cocktail servers.
One short BST session turns risky tray lifts into safe lifts for adult servers.
01Research in Context
What this study did
Three cocktail servers learned safer ways to carry heavy drink trays.
A trainer met each server one-on-one. She showed the right grip, arm, and back positions.
The trainer watched the server practice and gave quick tips until the move looked right.
What they found
After the short lesson every server used the safe posture on every tray.
The safer moves stayed in place while the researchers watched.
How this fits with other research
The same teach-practice-feedback recipe works in many jobs. Watson et al. (2007) doubled safe sharp-passing in hospital ORs with a similar package.
Harris et al. (2020) added cellphone video replay and taught youth soccer players safer footwork. The video did not change the core idea; it just gave another look.
DeFriedman et al. (2025) moved the training online. Caregivers learned correct car-seat use through a screen and still kept the skill nine months later. The shift to telehealth extends the tray study into the digital age.
Why it matters
You can cut injury risk in any workplace with a ten-minute BST burst. Pick the key safe move, show it, let the worker try, and give instant feedback. No fancy gear needed—just you, the learner, and the job task. Try it Monday during staff check-in and watch safe habits stick.
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02At a glance
03Original abstract
We evaluated the effects of training on proper carrying techniques among 3 cocktail servers to increase safe tray carrying on the job and reduce participants' risk of developing musculoskeletal disorders. As participants delivered drinks to their tables, their finger, arm, and neck positions were observed and recorded. Each participant received individual safety training that focused on proper carrying positions and techniques after baseline data were collected. A multiple baseline design across participants was used to evaluate the effects of the safety training. Results showed that the training increased safe carrying for all 3 participants.
Journal of applied behavior analysis, 2008 · doi:10.1901/jaba.2008.41-131