Comparison of Indicator Components and Push-Button Recommendations

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Abstract
Four consoles were designed identical in every respect except for the display and control components used in their construction. Two levels of illumination were employed. Sixteen fit male subjects, age range 19 to 50, were tested. Subjects were asked to respond to signals presented in a predetermined order by operating a control, e.g. a push-button or Post Office key. Reaction times weretaken using a simple time event recorder producing five-hole punched paper tape output. A note was taken of errors of operation. Some 30,000 reaction times were taken and analysed using a five-factor analysis of variance computer program. A similar rank order of the components was found for speed of response and accuracy of operation. Within the limits of the experiment a trans-illuminated push-button was operated with the lowest reaction time and with least error. Some factors affecting the design of push-button controls and their associated displays are discussed.