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. Author manuscript; available in PMC: 2017 Jul 25.
Published in final edited form as: Curr Biol. 2016 Jun 30;26(14):1861–1866. doi: 10.1016/j.cub.2016.05.014

Figure 1. Procedure of a trial in the A-DecNef training stage.

Figure 1

An achromatic (gray-black) vertical grating was presented during the induction period (6 sec), during which participants were trained to induce BOLD-signal multi-voxel patterns in V1/V2 corresponding to the color red, unbeknownst to participants. Immediately after the fixation period (7 sec), a feedback disk was presented for 1 sec. The disk size roughly represented how similar the BOLD-signal patterns in V1/V2 induced during the induction period were to the patterns evoked by the target color stimuli (red-black gratings) presented in the color classifier construction stage. See also Figure S1.