Fig. 1.

Overview of MRI simulation training protocol. First, the examiner and participant reviewed two “social stories,” one about the upcoming MRI session, the other about the “mock scan” training. Second, the child listened to 30-s-long multimodal MRI sounds outside the MRI simulator. For the 2 and 4 min steps, the child played the target game inside the simulator during which children were instructed to keep a white dot (representing the position of their forehead indexed by the motion tracker) in the green center of the target. Between the two target game steps, a 2-min musical movie was played, stopping when head motion exceeded 1.5 mm. Two 6-minutes blocks of R-fMRI simulations followed.