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THE DETECTION OF VISUAL INTENSITY DIFFERENCES BY PIGEONS
Author(s) -
Hodos William,
Bonbright James C.
Publication year - 1972
Publication title -
journal of the experimental analysis of behavior
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.75
H-Index - 61
eISSN - 1938-3711
pISSN - 0022-5002
DOI - 10.1901/jeab.1972.18-471
Subject(s) - logarithm , intensity (physics) , pattern recognition (psychology) , audiology , psychology , psychophysics , artificial intelligence , significant difference , statistics , mathematics , cognitive psychology , computer science , optics , mathematical analysis , physics , medicine , neuroscience , perception
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.