Fig. 1: Schematic representation of the experimental paradigm.

Schematic depicting participants performing a desktop-based source-monitoring task while their gaze is recorded with an eye-tracker. Each block was divided into an encoding and a test phase. a During the encoding phase, participants saw 30 objects presented sequentially in the upper or lower part of the screen along the vertical meridian. They had to maintain fixation on the central cross throughout the duration of the phase. To facilitate fixation, they performed a color judgment task that consisted in pressing a key whenever the fixation cross turned green. b During the test phase, participants saw 20 objects that were previously presented and 10 new distractor objects. Participants first determined whether the object was old or new (item memory); if they thought that the item was old, they then decided whether the object appeared up or down (spatial memory).