Abstract
A within-S design was used to compare the amount of contrast resulting from time-out and extinction. Five pigeons were trained to keypeck for 10 sessions on a mult VI 1-min VI 1-min schedule with alternating red and green key lights. Beginning with the 11th session, half the green key presentations in each session were preceded by extinction on the red key and half by time-out. Approximately equal amounts of behavioral contrast appeared during the green following the two conditions. However, responding was greater during the first 30 sec of the S+ presentation when the preceding stimulus was extinction than when it was time-out.
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This investigation was supported in part by PHS Research Grant 1 ROI MH18342 from the National Institute of Mental Health. Reprints may be obtained from Allen Vieth, Department of Psychology, Michigan State University, East Lansing, Mich. 48823.
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Vieth, A., Rilling, M. Comparison of time-out and extinction as determinants of behavioral contrast: An analysis of sequential effects. Psychon Sci 27, 281–282 (1972). https://doi.org/10.3758/BF03328962
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DOI: https://doi.org/10.3758/BF03328962