Temporal order judgement task
On day 2, participants received identical instructions for the retrieval task. Each trial included a triplet of static images, which were presented sequentially: First Probe Image, Distractor and Second Probe Image. The task was to choose the image that had happened earlier in the film between the two probe images. Subjects were explicitly instructed to ignore the distractor image. In this manner, the distractor images were irrelevant to the goal of the memory task. Participants indicated the target stimulus by pressing one of the two keys (Fig. 1B). The ITIs were jittered in the range of 3 – 5 s, uniformly distributed. The retrieval task was administered inside an MRI scanner, where the subjects viewed the back-projected visual stimuli via a mirror system (20 × 15° of visual angle) presented using Cogent Toolbox (http://www.vislab.ucl.ac.uk/cogent.php) running under MATLAB 7.4 (The MathWorks, Natick, MA).