Effects of a variable-ratio conditioning history on sensitivity to fixed-interval contingencies in rats

Article Abstract:

A study of the effects of a variable-ratio conditioning history on the responsiveness to fixed-interval contingencies in rats revealed that the high fixed-interval rates of histories tapered gradually and that accelerated response patterns developed equivalently, indicating sensitivity to fixed-interval situations. The development of differentiated patterns was not retarded by the elevated rates of histories. The sustained and undifferentiated responding observed in humans was absent in rats, irrespective of history.

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Delayed matching-to sample performance of hens: effects of sample duration and response requirements during the sample

Article Abstract:

Changes in the duration and response requirement of the sample keys influenced and affected the accuracy in the training of six domestic hens. A delayed matching-to-sample method was used with red and green keylights as sample, and comparison stimuli, plus a 1.5 seconds interval. The results are coherent with results obtained from experiments using other species and other techniques.

Methods, Performance, Usage, Laboratory animals, Chickens, Matching theory, Chickens as laboratory animals

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Concurrent second-order schedules: Some effects of variations in response number and duration

Article Abstract:

Concurrent second-order schedules with operant units are used to examine the effects of independent changes in response duration and number. The response and time bias measures appear to arise as by-products of the changes in operant-unit completions.

United States, Survey response rates

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