ABSTRACT
Subjects adapted to right-left reversal of the visual field by looking through a stationary, monocular reversing prism. The dominant hand was viewed through the prism while the subject drew pictures and doodled. At first there was great difficulty in moving the pencil in the desired direction, but in a short time it was possible to draw normally again. Eight subjects each received four 15-minute exposures to reversal; they neither saw nor wrote any letters or numbers during this time. After each practice period vision was blocked off, and the subject wrote letters and numbers as the experimenter called them out. Many of these characters were written backwards, in “minor-writing.” In addition, subjects sometimes wrote frontwards characters and thought they were backwards. These results are interpreted as indicative of a change in kinesthetic perception: After looking through the reversing prism at the moving hand, a left-to-right hand movement is perceived as right-to-left.
