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Published online by Cambridge University Press: 01 January 2025
Controlled by microphone, photocell, or keys, the described instrument operates a chronoscope, chronograph, etc., together with a projector, bell, light, or other stimulus requiring up to 200 watts.
Libbe.v, J. E. P. and Hunsicker, A. L. Portable response timer, Psychometrika, 1941, 6, 401-403.