Vibrotactile subjective magnitude as a function of hand preference

The vibrotactile subjective magnitudes of test stimuli were determined by a psychophysical matching technique as a function of the time interval between conditioning and test stimuli in right-, left-, and ambi-handed subjects. Ipsilateral stimulation on either hand produced equal amounts of enhancement of subjective magnitude in all subjects. Contralateral stimulation produced suppression, followed by enhancement in right- and left-handers, but produced no effect in ambi-handers. The results suggest that the bilateral neural connections of ambi-handers is different from those of right- and left-handers.