Chapter 4 – Experimental learning 135 Figure 5. Comparison of nocebo magnitudes after counterconditioning, between the partial reinforcement and continuous reinforcement. Differences in mean Numeric Rating Scale (NRS) pain ratings and standard deviations between the partial reinforcementcounterconditioning group and the continuous reinforcement-counterconditioning group (N = 49) are depicted. Dots represent the (jittered) individual data points. Time-course of attenuation To explore the time-course and slopes of attenuation, a line graph was plotted. Figure 6 displays the time-course of attenuation between all four active groups, from the start of the first evocation and throughout the attenuation phase. During attenuation, due to the counterconditioning groups receiving lower pain stimulations than the extinction groups, the nocebo trial NRS scores of the counterconditioning groups were visibly Partial reinforcement - Counterconditioning Continuous reinforcement - Counterconditioning Trial Nocebo Pre Nocebo Post NRS score 7 8 9
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