Voce di Glossario: Target
研究比较了三种心理物理技术（博格量表、视觉模拟量表、身体不适评分）在手工搬运任务中检测体力负荷的灵敏度，发现博格量表能区分更多任务条件，而身体不适评分无法区分任何条件。
The primary objective of the study was to determine the absolute and relative sensitivity of three psychophysical techniques of physical stress determination (Borg's Scale, the Visual Analogue Scale, and the Body Part Discomfort Rating) in varied manual materials handling tasks. Ten young male and ten young female university students lifted a 22 kg box onto a shelf 132 cm high. The industrial-size box (40 x 20 x 20 cm) had two cut-out handles on the top middle of the two side panels. The shelf had restricted access allowing 5 and 10 mm clearance for access. The palletizing was performed in sagittal and 45 degrees asymmetrical postures under unlimited, 90% and 80% of stature headroom. The subjects lifted the box six times per minute for 5 min. After every lift the load was automatically delivered to the starting position. The 12 experimental conditions were randomized. Following each 5-min palletizing task the subjects were required to assess the immediately foregoing task on Borg's scale, the Visual Analogue scale, and a Body Part Discomfort Rating scale. All data were subjected to statistical analysis including multivariate analysis of variance and Scheffé post-hoc multiple range test. Borg's scale was able to discriminate between two clearances, two symmetries and the three headrooms (p < 0.001). The Visual Analogue scale was able to differentiate between two symmetries and three headrooms (p < 0.01), but the Body Part Discomfort Rating could not differentiate between any task conditions. Based on the study it is suggested that an appropriate match between the task demands and the basis of a psychophysical tool is essential for valid and reliable information.