INTENSITY AND CRITICAL FREQUENCY FOR VISUAL FLICKER

Intensity and Critical Frequency for Visual Flicker

Using the rotating striped cylinder device previously employed for determination of the flicker response function with lower animals, corresponding measurements have been made with human observers. The curves based upon the relation between critical flash frequency and critical intensity for the signalling of the recognition of flicker have the properties of human flicker fusion data as obtaine...

Critical Flicker Frequency and Intelligence*

Tests of verbal intellegence (Concept Mastery Test) and nonverbal intelligence (Raven's Advanced Progressive Matrices) showed nonsignificant zero-order correlations and a nonsignificant multiple correlation with critical flicker frequency (CFF), in 100 university students. Age-partialled correlations were even lower, and corrections for attenuation and restriction of range yielded unimpressive ...

Critical flicker frequency and centrally-acting drugs.

THE critical flicker frequency (cff) may be defined as the fastest rate at which a flickering source of light appears to be flickering as opposed to being steady. It has a number of determinants including the luminance, wave-length, wave-form, and light-dark ratio of the stimulating light, the area, position, and light-adapted state of the retina illuminated, the duration of exposure, and the s...

Critical flicker frequency in q harp seal; evidence for duplexretinalorganization.

Critical fl icker frequency (CFF) was investigated in a free swimming harp seal using behavioral techniques. The resulting CFF vs intensity curve indicates a defi nite rod/cone break, suggesting a duplex photoreceptor population, whose presence had not been observed in previous morphological reports. 1 This research was supported by a National Research Council of Canada Grant to the second auth...

Critical flicker frequency: A stethoscope for minimal hepatic encephalopathy evaluation.