Relationship between Slip Distance and Perceptions of Slipperiness and Stability

Abstract

Falls precipitated by slipping are listed among the leading causes of occupational injuries. Several factors influence the risk of slips and falls, including perception of surface conditions. A study was conducted to investigate if perceptions of slipperiness and stability are related to slip distance at heel strike during normal walking. The investigation compared objective and subjective measures for thirty-one participants ranging in age from 19-67 years old. Participants were evaluated while walking at three velocities over three floor surfaces. The results indicated that there were significant differences in slip distance caused by floor surfaces, but perceptions did not reflect these changes. Correlations between slip distance and subjective evaluations of slipperiness and stability were r = −0.18, partially due to a large variability in perceptions between individuals. Small slips were not generally perceived, but a uniform cutoff distance could not be identified that would be appropriate for most individuals.