Figure 1. Task design for emotion modification.

Examples of two trials are shown, one with the neutral picture and the other with the negative picture. Here, the representative images are similar to the IAPS image used in the task. There are three instructions, including “diminish”, “maintain”, and “enhance”. The bottom picture is an example of a negative image, to depict trauma-related negative stimuli. For neutral pictures, subjects were asked only to “maintain” their responses.