Preference for Signaled Over Unsignaled Shock Schedules: Ruling Out Asymmetry and Response Fixation as Factors
Journal of the Experimental Analysis of Behavior
In Exp I, 6 naive female Sprague-Dawley rats were used to test whether a symmetrical choice procedure yields results different from those previously reported by P. Badia and S. Culbertson (see record 1972-31011-001) who used the unidirectional standard changeover procedure. Ss could change at any time from unsignaled to signaled shock by pressing a lever and from signaled to unsignaled shock by pressing a 2nd lever. Results were identical to those of the standard procedure and show the adequacy of that procedure. In Exp II, 4 naive female Sprague-Dawley rats were used to test whether choice of high-density signaled shock over low-density unsignaled shock, such as that used by P. Badia et al (see record 1974-02665-001), resulted from initial training with equal-density schedules. Results show that 3 of 4 Ss strongly preferred the signaled shock. It is suggested that these results rule out carry-overand response fixation as alternative explanations
preference for signaled vs unsignaled shock schedules in symmetrical choice procedure, female rats, comparison with P. Badia & S. Culbertson's study
Bruce B. Abbott and Pietro Badia (1984).
Preference for Signaled Over Unsignaled Shock Schedules: Ruling Out Asymmetry and Response Fixation as Factors. Journal of the Experimental Analysis of Behavior.41 (1), 45-52.