Citation

Algom D, Cohen-Raz L. J. Exp. Psychol. Hum. Percept. Perform. 1984; 10(4): 486-501.

Copyright

(Copyright © 1984, American Psychological Association)

DOI

10.1037/0096-1523.10.4.486

PMID

unavailable

Abstract

Evaluated psychological processes that occur when people judge velocity, using a matrix of distances and durations to produce a set of velocities ranging over 4 log units. 10 undergraduates made magnitude estimations of moving stimuli produced by a 10 × 10 factorial design of distances and durations. Overall findings indicate that both group and individual data obeyed the bilinear interaction prediction of a simple ratio model. The relation between perceived and actual velocity, as well as the psychophysical contingencies constructed from the marginal means of the design, revealed a power function with an exponent of 0.63 as a representative figure. Plotting subjective velocity against physical velocity with either duration or distance as the parameter resulted in families of converging psychophysical power functions. Results are consistent with the hypothesis of a dividing model operating in the integration of distance and duration information onto subjective velocity. (58 ref) (PsycINFO Database Record (c) 2012 APA, all rights reserved)