フリツカー頻度と四要因の関係の実験的検討

抄録

This experiment has been conducted to investigate the relationship between the cff and the experimental variables of intensity of illumination, sex, age, and individual variability. An electronic flicker unit was employed to produce and to control the flicker light, and two Kodak-Wratten filters with 0.3 and 1.0 density respectively were used to produce three levels of intensity of illumination. Forty subjects were used : ten males and ten females with the range of age from 22 to 26 years, and ten males and ten females in the 27 to 31 years age group.
The actual experimentation consisted of two sessions with three minutes intermission between them. For each session six readings were taken, three in the ascending order and three in the descending order. This procedure was repeated for each of the three levels of illumination which were presented according to the Latin square design. The dominant eye of the subject. was used throughout the experiment.
Summing up the findings of this study, the following tentative conclusions were reached :
1. The cff and the logarithm of intensity of illumination have a linear relationship.
2. The cff value is higher for male than. for female.
3. The older group had a lower cff valuesthan the younger group but the differencewas not significant.
4. The intervariability of the cff tends to increase with intensity of illumination while the intravariability of the cff tends to decrease with intensity of illumination.
5. In general both intervariability and intravariability tend to decrease with age.
6. In general, the cff value is constant from session to session.