Handedness and space errors

Two groups of left- and right-handed subjects compared the lengths of two simultaneous lines presented briefly, one on the left and one on the right of a fixation point. The subjects reported left (right) longer lines in a pair by pressing a key on the left (right) with the left (right) hand. Space errors were almost specular in the two groups. The hand shown to be less preferred according to a handedness test responded more often. Another group-of right-handed subjects compared the same lines by responding with crossed arms, so that longer left (right) lines in a pair were now reported with the right (left)hand. Space errors seemed to depend on a motor-pathway preference and perhaps also on an intentional bias