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COMPARISONS BETWEEN VARIABLE‐INTERVAL AND FIXED‐INTERVAL SCHEDULES OF ELECTRIC SHOCK DELIVERY
Author(s) -
Hymowitz Norman
Publication year - 1973
Publication title -
journal of the experimental analysis of behavior
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.75
H-Index - 61
eISSN - 1938-3711
pISSN - 0022-5002
DOI - 10.1901/jeab.1973.19-101
Subject(s) - interval (graph theory) , shock (circulatory) , electric shock , variable (mathematics) , food delivery , mathematics , statistics , medicine , physics , combinatorics , mathematical analysis , marketing , business , quantum mechanics
Responding maintained in rats under a variable‐interval 35‐sec food schedule was suppressed more by 60‐sec and 240‐sec fixed‐interval schedules of shock delivery than by 60‐sec and 240‐sec variable‐interval schedules of shock delivery. When the delivery of shock was preceded by a 5‐sec visual stimulus, little overall response suppression was found with either fixed‐interval or variable‐interval schedules. In a third experiment, the percentage of occasions on which a cue preceded each shock delivery was varied from 0% to 100%. For the fixed‐interval shock condition, the most suppression occurred with the 0% treatment, the least with 100%, and an intermediate amount with the 50% treatment. For the variable‐interval groups, the most suppression occurred in the 50% condition, the least in the 100% group, and an intermediate amount with 0%.