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. 2021 Feb 15;14:149–158. doi: 10.2147/PRBM.S292172

Figure 1.

Figure 1

Schematic representation of the binary choice task. After a variable central fixation (800–1200 ms), two snack items were presented simultaneously on the screen for 500 ms and participants were asked to choose their preferred item by pressing a button. The central fixation become dimmed when a response was made.