出版社：Faculdade de Psicologia, Pontifícia Universidade Católica do Rio Grande do Sul
摘要：The crossing of hands increases Manual Reaction Time (MRT) in spatial
compatibility tasks. This occurs because the position of the hands has to be
first taken into account by the brain before response is executed. This study
tested the influence of two parameters on MRT: the position of the effector hand
and the location of its projected action, both properly dissociated with the aid
of laser pointers. While hands were kept on their respective sides the laser
beam was either directed towards the stimulus (compatible condition) or to the
opposite side (incompatible condition). Besides, the laser beam could be either
directed towards the effector (hand) side or across the midline towards the
opposite hemifield (uncrossed and crossed conditions). Our results show both
compatibility and crossed effects on MRTs, indicating that spatial interactions
occur between the projected action and both the stimulus (compatibility effect)
and response key (crossed effect) positions.
