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In pure scenes, objects hardly ever happen in isolation however appear within a spatiotemporal context. Here, we show that the perceived size of a stimulus is significantly affected by the context of the scene: temporary earlier presentation of larger or smaller adapting stimuli at the identical region of space adjustments the perceived measurement of a take a look at stimulus, with bigger adapting stimuli causing the test to appear smaller than veridical and vice versa. In a human fMRI study, we measured the blood oxygen level-dependent activation (Bold) responses of the first visual cortex (V1) to the contours of giant-diameter stimuli and found that activation carefully matched the perceptual fairly than the retinal stimulus dimension: the activated area of V1 elevated or decreased, depending on the dimensions of the previous stimulus. A mannequin based on native inhibitory V1 mechanisms simulated the inward or outward shifts of the stimulus contours and hence the perceptual results. Our findings counsel that space V1 is actively concerned in reshaping our notion to match the brief-term statistics of the visual scene.
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發表於 2025-8-9 22:08:44