A new latency measurement system was devised for multi-purpose (LAMS-I) use at the Department of Educational Psychology of Kyusyu University. This system has the following merits: (a) It can control 2 kinds of stimuli (visual and auditory), and can measure reaction times in msec units, (b) it is equipped with the circuit which is relatively robust against the internal and/or external noises, (c) stimulus presentation times, interstimulus intervals, and intertrial intervals can be varied independently, (d) the Ss can respond with 2 modes (voice or hands), (e) if an adaptor is attached to this device, latencies can be measured even with very low pressure and strain, and (f) the body is compact and light, and can be made at a low price.
