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. 2023 Feb 1;9(2):e13354. doi: 10.1016/j.heliyon.2023.e13354

Fig. 1.

Fig. 1

The visual discrimination task. Participants performed 4 rounds of a 2-alternative forced choice task where they indicated whether the test grating had a higher or lower spatial frequency compared to the sample stimulus, briefly interrupted by an inter-stimulus interval (ISI).