Open AccessGait perception of part‐reverse biological motion pattern produced by eight point‐lights attached to the back of a walker 1
Author(s) -
SUMI SHIGEMASA
Publication year - 2005
Publication title -
japanese psychological research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.392
H-Index - 30
eISSN - 1468-5884
pISSN - 0021-5368
DOI - 10.1111/j.1468-5884.2005.00284.x
Subject(s) - shoulders , point (geometry) , gait , biological motion , psychology , perception , mathematics , computer vision , artificial intelligence , anatomy , motion (physics) , orthodontics , physical medicine and rehabilitation , computer science , medicine , geometry , surgery , neuroscience
The Johansson side‐view point‐light walker (PLW) gives a vivid impression of an invisible human, and the Cutting C m (center of moment), determined by the relative widths of the shoulders and hips of the walker, is a well‐known important parameter for sex identification of perceived gait. The back‐view PLWs produced by the eight point‐lights attached to the back of a walker also give a clear image of human gait (Sumi, 2000). In the present investigation, the part‐reverse (P‐R) PLWs were used as stimuli. In the P‐R PLWs, the lower‐half elements (knees and heels) of the back‐view PLWs were arranged to be the reverse of their normal PLWs and the upper half elements (shoulders and hips) were arranged exactly the same as their normal PLWs. Results revealed that the P‐R PLWs were identified correctly as often as the normal PLWs, indicating that the Cutting C m is valid for the back‐view PLWs. It was also found that, when the sex of the P‐R PLW was identified correctly, the age was estimated to be younger, whereas when the sex was not identified correctly, the age was estimated to be older. This finding was discussed in relation to the difference between the data profiles obtained from the P‐R PLWs and the normal PLWs.