TWO-FLASH FUSION THRESHOLD: THE INFLUENCE OF AGE, PSYCHOPHYSICAL METHOD, INSTRUCTIONS, VIEWING CONDITIONS, SEX AND SUBJECT VARIABILITY

In a series of studies with normals concerned with the time interval required for two successive light flashes to be perceived as one flash (TFF threshold) it was found that: age and psychophysical method are related significantly to the TFF score; binocular viewing requires a shorter inter‐flash in...

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Bibliographic Details
Published in:The British journal of psychology 1968-11, Vol.59 (4), p.407-414
Main Authors: PEARSON, L. A., TONG, J. E.
Format: Article
Language:English
Subjects:
Adolescent
Adult
Age Factors
Analysis of Variance
Child
Child, Preschool
Female
Flicker Fusion
Functional Laterality
Humans
Male
Methods
Middle Aged
Sex Factors
Time Factors
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Summary:In a series of studies with normals concerned with the time interval required for two successive light flashes to be perceived as one flash (TFF threshold) it was found that: age and psychophysical method are related significantly to the TFF score; binocular viewing requires a shorter inter‐flash interval for fusion than monocular viewing; handedness has no significant relation to monocular score; sex and instructions are not significant variables, but results suggest the importance of strict experimental control. Age is also related to vacillation around the fusion point. The data indicate that theoretical excursions with the psychopathology of TFF could be premature.
ISSN:0007-1269
2044-8295
DOI:10.1111/j.2044-8295.1968.tb01155.x