Lateral asymmetry of retroactive inhibition in a psychomotor skill

Right-handed college students (N equals 160) received 10 practice trials on inverted-reversed printing with either the left or right hand followed by 10 additional trials with either the same or the other hand. Half the Ss then received 10 interpolated learning trials of inverted-but-nonreversed printing, while the other half of the Ss worked arithmetic problems. Significant retroactive inhibition occurred for Ss printing with the right hand, but not for Ss printing with the left hand.