Figure 1.

Experimental procedure. Incidental encoding block: Trials started with central fixation on a fixation symbol. Upon fixation, an image was displayed at the center of the screen for 2000 ms. Participants were instructed to simply observe and to explore images when they appeared on the screen. Trials were interleaved by a blank 1000 ms intertrial interval. Testing block: As for the encoding block, participants first fixated a fixation symbol, after which an image was displayed for 2000 ms. Participants were again instructed to simply observe and to explore scenes when they appeared on the screen. Thereafter, participants were asked whether the image was “old” (presented in the first block) or “new” (not presented in the first block). After an “old” response, participants indicated whether they “remember” or “know” the picture. Thereafter, participants clicked on and drew a circle around the image area that informed their memory decision. When an image was reported as “remembered,” they selected the specific recollected image area. When an image was reported as “known,” they selected the image area that felt most familiar. In the case of new images, they selected the image area that appeared most novel.