Mental transformations in the identification of left and right hands.

@article{citeulike:3139577, abstract = {Subjects determined as rapidly as possible whether each line drawing portrayed a left or a right hand when the drawings were presented in any of four versions (palm or back of either hand) and in any of six orientations in the picture plane. Reaction time varied systematically with orientation and, in the absence of advance information, was over 400 msec longer for the fingers-down orientation. However, when subjects were instructed to imagine a specified (palm or back) view of a specified (left or right) hand in a specified orientation, reaction times to test hands that were consistent with these instructions were short (about 500 msec), independent of orientation, and unacompanied by errors. It is proposed that subjects determine whether a visually presented hand is left or right by moving a mental "phantom" of one of their own hands into the portrayed position and by then comparing its imagined appearance against the appearance of the externally presented hand.}, author = {Cooper, L. A. and Shepard, R. N. }, citeulike-article-id = {3139577}, issn = {0096-1523}, journal = {Journal of experimental psychology. Human perception and performance}, month = {February}, number = {1}, pages = {48--56}, posted-at = {2008-08-20 11:44:19}, priority = {2}, title = {Mental transformations in the identification of left and right hands.}, url = {http://view.ncbi.nlm.nih.gov/pubmed/1141835}, volume = {104}, year = {1975} }

TY - JOUR ID - citeulike:3139577 L3 - citeulike-article-id:3139577 N2 - Subjects determined as rapidly as possible whether each line drawing portrayed a left or a right hand when the drawings were presented in any of four versions (palm or back of either hand) and in any of six orientations in the picture plane. Reaction time varied systematically with orientation and, in the absence of advance information, was over 400 msec longer for the fingers-down orientation. However, when subjects were instructed to imagine a specified (palm or back) view of a specified (left or right) hand in a specified orientation, reaction times to test hands that were consistent with these instructions were short (about 500 msec), independent of orientation, and unacompanied by errors. It is proposed that subjects determine whether a visually presented hand is left or right by moving a mental "phantom" of one of their own hands into the portrayed position and by then comparing its imagined appearance against the appearance of the externally presented hand. IS - 1 JF - Journal of experimental psychology. Human perception and performance SN - 0096-1523 EP - 56 TI - Mental transformations in the identification of left and right hands. VL - 104 SP - 48 AU - Cooper, LA AU - Shepard, RN PY - 1975/02// UR - http://view.ncbi.nlm.nih.gov/pubmed/1141835 ER -