Results 251 to 260 of about 32,031 (301)

Critical flicker frequency and intelligence

Intelligence, 1983
Abstract Tests of verbal intelligence (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.
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ERG Critical Flicker Frequency Assessment in Humans

2011
Scotopic and photopic critical flicker frequency (CFF) were measured in normal subjects between the ages 20–28 and 50–58 years. Flicker electroretinograms (ERG) were recorded with stimulus frequencies from 4 to 16 Hz for scotopic intensities and 25–72 Hz for photopic intensities.
Kristen E, Bowles, Timothy W, Kraft
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Critical Flicker Frequency, Personality and Sex of Subjects,

Perceptual and Motor Skills, 1989
This study was designed to investigate differences in personality type and sex of subjects on critical flicker frequency (CFF) of normal and problem-children from two secondary schools. Students, 20 problem-children and 20 normal children, were tested on critical flicker frequency. Both sexes were equally represented in the two groups.
TAHA AMIR, M. R. ALI
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Critical Flicker Frequency, Photochemical Mechanisms, and Perceptual Responses

Archives of Ophthalmology, 1958
Introduction In the past 15 years a great deal of attention has been directed toward the phenomenon of "flicker" as an indicator of retinal sensitivity and pathology. This report will present results with a flickermeasuring device, only slightly modified from that described in 1952.
R H, PECKHAM, W M, HART
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Effect of Striated Fields on Critical Flicker Frequency

Journal of the Optical Society of America, 1959
Critical flicker frequency measurements were obtained as a function of retinal illuminance for a square centrally regarded field (8.5 degrees on a side) containing various numbers of vertical stripes. The visual field contained under the different experimental conditions 0, 10, 30, 90, and 250 black lines per inch, corresponding to an angular subtense ...
E H, GRAHAM, C, LANDIS
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Critical Flicker Frequency under Monocular and Binocular Conditions

Perceptual and Motor Skills, 1991
Critical flicker frequency of 40 undergraduate students, 20 men and 20 women whose mean age was 19.3 yr., was measured under monocular and binocular viewing conditions, using the Lafayette Visual Perception Control with Display Unit. Half of the subjects received monocular treatment first and binocular treatment second, and the other half received the
M R, Ali, T, Amir
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Critical Flicker Frequency in Light- and Dark-Adaptation

The Journal of General Psychology, 1958
(1958). Critical Flicker Frequency in Light- and Dark-Adaptation. The Journal of General Psychology: Vol. 58, No. 1, pp. 11-16.
A, DONDERO, P R, HOFSTAETTER, J P, O'CONNOR   +2 more
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Circadian Variation of Critical Flicker Frequency among Children

Perceptual and Motor Skills, 1974
Circadian changes in CFF thresholds of 28 children, 14 boys and 14 girls, were investigated. Binocular thresholds were obtained by the method of limits from 9 a.m. to 9 p.m. in 5 sessions, spaced 3 hr. apart. A diurnal effect was found, namely, a rise and a decline in CFF values with a peak at 12 p.m. ( p < .01).
M, Musumeci, H, Misiak
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Self-Determination of Critical Flicker Frequencies in Monkeys

Science, 1962
Five rhesus monkeys have been successfully trained by operant conditioning techniques to continuously adjust the rate of flicker of an illuminated target above and below what is presumed to be their fusion threshold.
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Development of critical flicker frequency in human infants

Vision Research, 1981
Abstract The forced-choice preferential looking (FPL) technique was used to trace the development of critical flicker frequency (CFF) in human infants. CFF was found to improve markedly between 4 and 8 weeks of age and to a lesser extent between 8 and 12 weeks.
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