VDT작업환경에서 앉은 자세에 대한즉각적 피드백과 지연된 피드백의 효과비교

초록

The purpose of this study was to examine the relative effectiveness of immediate and delayed feedback on unsafe sitting behaviors that may cause VDT syndromes. Participants were four white color workers (2 males and 2 females) who spend most of their working time on interacting with computers. Chairs were developed particularly for the present study such that they could detect participants' unsafe sitting postures using sensors and provide feedback on the computer monitors. Under the delayed feedback condition, the feedback was provided after each 6 hour session was completed. Under the immediate feedback condition, on the contrary, small “pop-up” windows appeared on the computer monitor whenever participants engaged in unsafe postures more than 14 seconds. Multiple baseline across participants were adopted. After baseline phase, the delayed feedback condition was first introduced and then the immediate feedback condition was added for the next phase for two participants. For the remaining two participants, the delayed plus immediate feedback was first introduced after baseline and then the immediate feedback was withdrawn for the next phase. The results indicated that feedback, regardless of the type, considerably increased safe sitting behaviors. More importantly, the immediate feedback was more effective than was the delayed feedback in increasing safe sitting behaviors.

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