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. 1972 Nov;18(3):471-9.
doi: 10.1901/jeab.1972.18-471.

The detection of visual intensity differences by pigeons

W Hodos, J C Bonbright Jr

The detection of visual intensity differences by pigeons

W Hodos et al. J Exp Anal Behav. 1972 Nov.

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.

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References

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