THE DETECTION OF VISUAL INTENSITY DIFFERENCES BY PIGEONS
- 1 November 1972
- journal article
- research article
- Published by Wiley in Journal of the Experimental Analysis of Behavior
- Vol. 18 (3), 471-479
- https://doi.org/10.1901/jeab.1972.18-471
Abstract
Pigeons were trained in a conditional discrimination procedure to discriminate between visual stimuli that varied in intensity. The magnitude of the intensity difference ranged from 0.80 to 0.05 logarithmic units. Psychometric functions were calculated from the data and the mean difference threshold for the 11 subjects was approximately 0.12 logarithmic units. A signal-detection analysis of the data suggested that stimuli that were below the calculated threshold were detectible to the subjects.Keywords
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