Abstract

The threshold size of an object as a function of its speed has been determined, with the eyes fixed using seven different speeds from 55 to 600 cm/sec. The relationship is found to be linear and is given by the equation O = a+bV, where O is the threshold size in millimeters, V is the speed in centimeters per second, and a and b are constants characteristic of the individual. It is suggested that the spatio–temporal pattern at the psychovisual cortex is in some way responsible for the observed function.

© 1964 Optical Society of America

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References

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  1. B. Bhatia and C. A. Verghese, J. Opt. Soc. Am. 53, 283 (1963).
    [Crossref] [PubMed]
  2. B. Bhatia, J. Aviation Med. 28, 309 (1957).
  3. B. Bhatia, J. Opt. Soc. Am. 50, 149 (1960).
    [Crossref] [PubMed]

1963 (1)

1960 (1)

1957 (1)

B. Bhatia, J. Aviation Med. 28, 309 (1957).

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Figures (1)

F. 1
F. 1

Relationship between the threshold size of the object and its speed. Lines drawn from the equation O=a+bV for Subjects 1, 2, and 3.

Tables (1)

Tables Icon

Table I Values of b and a in the relationship O = a+bV. V is the speed of object in centimeters per second; O, the threshold size of object in millimeters; and r, the coefficient of correlation between O and V.

Equations (3)

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Δ L ( T + t ) = I R 1 ( T + t ) ( I R 1 T + I R 2 t ) = I ( R 1 R 2 ) t ,
Δ L ( T + t ) L ( T + t ) = ( R 1 R 2 ) I t R 1 ( T + t ) I = K 2 t T + t ,
Δ L ( T + t ) / L ( T + t ) = K 2 [ O / ( S + O ) ] ,