overall: 17.9 cm x 13.5 cm x 30 cm; 7 1/16 in x 5 5/16 in x 11 13/16 in
Object Name:
Voice Key
voice keys
Other Terms:
Voice Key; Diagnostic Medicine
Description:
Voice keys are used in reaction time experiments. This form—in which sound causes the foil membrane to vibrate, activating a timing device through the stimulation of an electric circuit—was developed by Knight Dunlap (1875-1949), an American psychologist who believed in a neuropsychological foundation for consciousness that could be explained and studied scientifically as a process.
