Idiosyncratic selection of active touch for shape perception.

ABSTRACT: Hand movements are essential for tactile perception of objects. However, the specific functions served by active touch strategies, and their dependence on physiological parameters, are unclear and understudied. Focusing on planar shape perception, we tracked at high resolution the hands of 11 participants during shape recognition task. Two dominant hand movement strategies were identified: contour following and scanning. Contour following movements were either tangential to the contour or oscillating perpendicular to it. Scanning movements crossed between distant parts of the shapes' contour. Both strategies exhibited non-uniform coverage of the shapes' contours. Idiosyncratic movement patterns were specific to the sensed object. In a second experiment, we have measured the participants' s

SUBMITTER: Mizrachi N 

PROVIDER: S-EPMC8861104 | biostudies-literature | 2022 Feb

REPOSITORIES: biostudies-literature