This was recorded with the multiple choice apparatus 653 MP (reaction time apparatus), an Inco company product
(Ambala) has resolution of 0.001 seconds. The visual stimuli are red, green yellow and orange lights The subjects sits to one
side and examiner sits to other side of instrument. When examiner press switch visual stimuli appear on screen which is in
front of the subjects. The instrument automatically starts counting of time. When subject press the key as a response to visual
stimuli instrument stops counting of time. This time is taken as reaction time. During the reaction time testing, visual stimuli
was given for three times and minimum reaction time was taken as the final reaction time for that sensory modality of that
subject.