Figure 2
Schematic design of the Facial Emotion Recognition Paradigm36 and examples of emotional faces from FACES database43 and shapes. (A): The figure shows that the experiment started with a try-out session in which participants solved one matching face and one matching shapes try-out trial. This was followed by task sessions (12 blocks) that were presented successively (first a baseline block which was always followed by a matching emotion block). Each 30 s block contained six matching trials and subjects were instructed to choose one of the two test faces presented at the bottom (left or right) that was identical to the target image (centre top position). Within each trial, the corresponding stimuli sets stayed on the screen for the entire 5 s, even after the participant made a choice. In all emotion block, the same target emotional expression was presented for six times across the trials. (B): Examples of presented emotional faces with four different expressions (neutral, fearful, angry and sad) and geometric shapes (circle, vertical and horizontal ellipses).
