Fig 1.
Visual representation of the Experimental Procedure.
In an initial phase participants were asked to fill out two questionnaires and to perform four rating judgments. I. First session of the Emotion Recognition Task. II. Food ingestion: one group of participants was asked to eat ~5gr of dark chocolate, whereas the other group was asked to ingest a spoonful of fish sauce. After food intake participants were asked to perform an emotion intensity judgment. III. Second session of the Emotion Recognition Task, followed by another emotion intensity judgment and IOS rating scale. The faces depicted in this figure are not the original ones from the KDEF dataset, but are mere examples. The individuals have given written informed consent (as outlined in PLOS consent form) to publish their faces.
Fig 2.
Results for the Emotion Recognition Task.
Graphs showing performance on the emotion recognition task, before and after either dark chocolate (top panel) or fish sauce (bottom panel) intake. Accuracy in recognizing angry, disgusted or happy facial expressions were measured (percentage of correct responses, y axis). Error bars reflect standard error of the mean, and asterisk indicates p < 0.05, two-tailed.
Fig 3.
Results for the Emotion Recognition Task.
Graphs showing performance on the emotion recognition task, before and after either dark chocolate (top panel) or fish sauce (bottom panel) intake. Mean Reaction Times (msec, y axis) in recognizing angry, disgusted or happy facial expressions were measured. Error bars reflect standard error of the mean, and asterisk indicates p < 0.05, two-tailed.