Abstract
Pecks to a 15-rpm clockwise visual stimulus were reinforced on a mult VI 30-sec EXT schedule. Pecks were extinguished in the presence of: Part A, a dark key; Part B, a 10-rpm clockwise stimulus; Part C, a 15-rpm counterclockwise stimulus. In Parts A and B, the results indicated that responding to counterclockwise rotations mirrored the pattern of responding to clockwise rotations. In Part C a different pigeon learned to discriminate between clockwise and counterclockwise rotations, but generalization tests 5 and 12 days after the original tests showed emergence of the mirror effect noted in the first two parts.
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Stehouwer, D.J., Denny, M.R. Discrimination of speed and direction of rotation in the pigeon: A mirror-image effect. Bull. Psychon. Soc. 5, 101–104 (1975). https://doi.org/10.3758/BF03333214
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DOI: https://doi.org/10.3758/BF03333214