Reaction Time Apparatus for Simple. Choice, & Discriminative R.T. (For both auditory and visual)

The instrument has a set of keys on the subject side and another set of keys on the experimenter side for presentation of different types of stimuli such as sound, light and click. This instrument has a built in timer which will automatically record lapse of time (R.T) in milli-seconds. It is an electrically operated instrument. This instrument is used to measure simple choice, and discrimination reaction time for both visual and auditory stimuli.