Fig. 2: Task design.
From: Threat reversal learning and avoidance habits in generalised anxiety disorder
Study 1: Threat reversal paradigm. One of the faces co-terminated with a shock on 8 out of 24 trials. SCR analysis was done on the CS+ trials without shock. Aversive contingencies were then switched to the other face with the same shock ratio. Study 2: Pavlovian Avoidance Habit Acquisition. Pavlovian stimulus-outcome contingencies were 100% deterministic for 40 trials where different stimuli predicted shocks on either the left or right side. Participants were instructed they could cancel the shock corresponding to the otherwise aversive predictive stimuli by pressing a footbox on either the left or right side. One of the stimuli was not paired with shock and remained safe throughout the task.
