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. 1973 Jan;19(1):187–189. doi: 10.1901/jeab.1973.19-187
An inexpensive mechanism for programming multiple variable-interval schedules of reinforcement1
L A Engberg
, K L Wheatley
L A Engberg
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K L Wheatley
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1
Preparation of this manuscript was supported by N. I. H. Research Grant HD-03486 and Training Grant MH-10427 under the direction of David R. Thomas. The authors wish to acknowledge the technical assistance of James Geidel, Foreman of the University of Colorado Psychology Shop.
PMCID: PMC1334064 PMID: 16811649
