Hand Preference in Sequential and Spatial Discrimination Tasks

Hand preference in sensorimotor discrimination tasks was tested on 80 right handed subjects in four experiments. One set of experiments compared the abilities of the two hands to perform sequential tasks. The other set compared spatial abilities of the two hands. Within each set one experiment involved unimanual performance, and the other bimanual performance. The results showed that subjects performed better with their right hand on the bimanual sequential task, and better with their left hand on the bimanual spatial task. No hand preference was found in the unimanual tasks. The results are interpreted as reflecting the differential sensorimotor dominance of the left and right hemispheres for sequential and spatial tasks respectively.