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Determination of the transient response of a system as complex as vision when the sensory characteristics of that response elude definition may be accomplished by measuring the difference threshold for increases in the interval between double pulses at various pulse intervals.
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Developed a device composed of a rod clamped in a rotatable, vertical vise, which forms the basis of a bite-board holder for vision research.
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Described a timer circuit which produces pulse durations ranging from .1-20,000 msec. The timer has high reliability, is inexpensive, and simple to construct.
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Presents data on visual discrimination of 2-pulse-interval differences.
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Discusses the rationale for a constant source of both luminance and illuminance to check photometer calibration. The inexpensive construction of such a reference source is described, and some performance data are given.