Shih Y C, Wang M J
Department of Industrial Engineering, National Tsing Hua University, Hsin-Chu, Taiwan, ROC.
Ergonomics. 1996 May;39(5):729-39. doi: 10.1080/00140139608964494.
In this study, six different types of gloves commonly used in industry (surgical, cotton, nylon, leather, rubber, and whizard knife hand gloves) were evaluated at four different weight levels (8.2, 3, 1.5 and 0.25 kg). Six males and six females voluntarily took part in this study. The dependent variable was the difference limen (or difference threshold) (abbreviated as DL(%)) of the discriminating weight difference (DWD). A nested-factorial design with the subject nested under gender was employed. The results indicate that the weight level had a negatively significant effect on the DL(%). The mean difference thresholds were 3.49, 5.39, 6.08, and 9.45 for the weight levels at 8.2, 3, 1.5, and 0.25 kg, respectively. The individual difference becomes obvious when the weight level is relatively light (0.25 kg). However, the effects of gender, glove, gender x weight, and weight x glove were found to be insignificant, and there was no significant correlation between the DL(%) and glove characteristics (thickness and weight). Subsequently, four additional weight levels (0.01, 0.5, 1 and 15 kg) were considered, and a psychophysical equation was derived: DL(%) = 34.33 x W(0.238) (R2 = 0.98), where W represents the weight level. These results support the power function. A minimum weight difference with 90% confidence of correct detection was suggested.
在本研究中，对工业中常用的六种不同类型的手套（手术手套、棉手套、尼龙手套、皮手套、橡胶手套和巫师刀护手手套）在四个不同重量水平（8.2、3、1.5和0.25千克）下进行了评估。六名男性和六名女性自愿参与了本研究。因变量是辨别重量差异（DWD）的差别阈（或差别阈值）（缩写为DL(%)）。采用了性别嵌套受试者的嵌套因子设计。结果表明，重量水平对DL(%)有显著负向影响。8.2、3、1.5和0.25千克重量水平下的平均差别阈值分别为3.49、5.39、6.08和9.45。当重量水平相对较轻（0.25千克）时，个体差异变得明显。然而，发现性别、手套、性别×重量和重量×手套的影响不显著，并且DL(%)与手套特性（厚度和重量）之间没有显著相关性。随后，考虑了另外四个重量水平（0.01、0.5、1和15千克），并推导了一个心理物理学方程：DL(%) = 34.33 × W(0.238)（R2 = 0.98），其中W代表重量水平。这些结果支持幂函数。提出了具有90%正确检测置信度的最小重量差异。
