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. 2014 Jun 18;9(6):e99667. doi: 10.1371/journal.pone.0099667

Figure 1. Experimental design for a single trial.

Figure 1

The task consisted of 110 trials (22 neutral and 88 negative). A single trial lasted 15,5 seconds. Every 9 or 10 trials were followed by a fixation cross of 20 seconds.