An individual's handedness was hypothesised to affect their reaction times when using them to measure interhemispheric interaction. ... The study found a crossed-uncrossed difference of -3.8 milliseconds (ms), while right handers were found to react faster, -2.7ms, than left handers, -4.9ms.

Do right-handed people have a faster reaction time?

Right-handers recognised a right hand faster than a left hand, whereas no significant difference was seen for left-handers. ... The findings suggest that the differences in the reaction times between left- and right-handers depend on a laterality balance of hand motor skills.

Will using the non preferred hand affect reaction time?

Results showed: (1) For single responses and paired responses to simultaneous stimuli, responses by the dominant hand were made significantly faster than by the non-dominant hand.