The Fixedlnterval Procedure FlProcedure

At each time unit (here taken as 1-sec intervals) the procedure determines whether food should be delivered. The cycle clock maintains a record of the number of seconds since food was delivered. For the fixed-interval procedure, food is primed if the clock equals or exceeds a fixed interval (set in the initialization of the procedure). If food is primed and a response is made (as determined by the model), an indication that food has been delivered is set, and a record is made of the time that the food was delivered and the event of food delivery (Food_code = 19). If a response is made, a record is made of the time of the response and the response event (Response_code = 1). The data then consist of a matrix, with each row consisting of a time and an event (1 or 19). The number of rows is equal to the number of events (responses plus food deliveries). See Appendix 2.

Relative Time

FIGURE 1.4 Basis for a decision in a fixed-interval schedule of reinforcement. Relative discrepancy decreases as a function of relative time. A high rate of responses occur when the relative discrepancy is less than the sample of the threshold (b). This occurs at relative time Sj.

Relative Time

FIGURE 1.4 Basis for a decision in a fixed-interval schedule of reinforcement. Relative discrepancy decreases as a function of relative time. A high rate of responses occur when the relative discrepancy is less than the sample of the threshold (b). This occurs at relative time Sj.

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