Fig. 2

Example of an experimental trial for diagnostic performance shown to the participants in three experiments. Trials began with a fixation cross followed by the cardiac movie and a response screen for detection. The subsequent categorization screen was displayed if the participant responded “Yes” for abnormal. Note: Movie durations were as follows: Experiment 1: 3 s, Experiment 2: 2 s, Experiment 3: Either 1 s or 10 s