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CHOICE OF LONGER OR STRONGER SIGNALLED SHOCK OVER SHORTER OR WEAKER UNSIGNALLED SHOCK 1
Author(s) -
Badia Pietro,
Culbertson Stuart,
Harsh John
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.1973.19-25
Subject(s) - shock (circulatory) , changeover , intensity (physics) , duration (music) , psychology , audiology , medicine , physics , optics , quantum mechanics , voltage , acoustics
Unsignalled, inescapable shocks were presented to four albino rats in one study and to six rats in a second study. By pressing a lever, subjects could change the condition to signalled shock for 3 min after which unsignalled shock was automatically reinstated. All subjects changed frequently to the signalled shock schedule. After a minimum of three 6‐hr sessions or after changeover responding stabilized at the previous values, higher values of signalled shock intensity or duration were introduced. In the first study, the duration of signalled shock was increased in increments of 0.5 sec. In the second study, the intensity of signalled shock was increased in increments of either 0.2 or 0.4 mA. Duration subjects chose signalled shock four (2.0 sec) to nine times (4.5 sec) longer than unsignalled shock (0.5 sec). Intensity subjects chose signalled shock two (2.0 mA) to three times (3.0 mA) more intense than unsignalled shock (1.0 mA).