The Effects of Self-Monitoring on Safe Posture Performance

ABSTRACT

The purpose of the present study was to examine the effects of self-monitoring on safe positioning of individuals performing a typing task and an assembly task using a multiple baseline design across behaviors and tasks. The study took place in an analogue office setting with seven college student participants. The dependent variable was the percentage of observations scored as safe, and each session was recorded via a hidden camera. Each block of sessions included completing a typing task for two 9-minute sessions and an assembly task for two 9-minute sessions. During baseline, participants received information regarding safe positions and demonstrated the positions. In the self-monitoring phase, participants recorded whether a targeted posture was safe or at-risk. If constraints of the study permitted it, a third phase was implemented. In the third phase, if the targeted postures improved at least 20 percentage points over baseline during self-monitoring, additional behaviors were monitored. Otherwise, an overt camera condition was implemented during the third phase in addition to self-monitoring. Five of the 17 dependent variables exposed to the self-monitoring intervention resulted in substantial changes in safety performance, and an additional six behaviors resulted in a mean improvement of more than 10% from baseline to intervention. The camera present condition produced differential improvement for two of the 12 exposed postures. This information could lead to a viable alternative for improving occupational safety.

KEYWORDS:

• Self-monitoring
• ergonomics
• safety
• posture

ACKNOWLEDGMENT

The authors would like to thank Kelly Copus, Lauren Frye, Sonja Humy, and Erik Pajula for their assistance with data collection. They would also like to thank the OBM Network and WMU Graduate College for their generous awards to fund this study.