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Jun Saiki, Meiko Shibata; Effects of previewing intrinsic color-shape conjunction on temporal illusory conjunctions. Journal of Vision 2016;16(12):1075. doi: 10.1167/16.12.1075.
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© ARVO (1962-2015); The Authors (2016-present)
In visual memory, bindings of shape with its figure color (intrinsic binding) and with its background color (extrinsic biding) are qualitatively different. We investigated effects of intrinsic and extrinsic bindings in visual memory on perceptual identification of shape-color binding. Participants previewed a sample display composed of a nonsense figure with colors for 1 s, followed by an RSVP sequence. In Experiment 1, participants previewed a figure with both intrinsic and extrinsic colors, and detected the sample figure from the RSVP sequence. The RSVP sequence contained either intrinsic or extrinsic colors alone. The target figure had the color of matched location of the sample (match condition), the color of mismatched location of the sample (mismatch condition) or a color not presented in the sample (different condition). Compared with the different condition, the detection performance was higher in the match and mismatch conditions with the intrinsic and extrinsic trials, respectively, suggesting that only intrinsic color of the sample display facilitated the detection of sample figure. To investigate the effect of preview on temporal illusory conjunctions, we showed participants a preview with only intrinsic color and asked them to identify the intrinsic color (Experiment 2) and extrinsic color (Experiment 3) of the target shape. Overall, the post-target illusory conjunction was more frequent than the pre-target illusory conjunction. This pattern was modulated by the sample display in two ways. First, when the sample color was presented one item prior to the target, the pre-target illusory conjunction significantly increased for both intrinsic and extrinsic sequences. Second, only for the intrinsic sequence, the intrinsic color presented with the target shape significantly reduced the illusory conjunction. Intrinsic colors facilitate the detection of the target shape, increase pre-target illusory conjunction regardless of figure/ground distinction, and rescue from post-target illusory conjunctions exclusively at the figural location.
Meeting abstract presented at VSS 2016
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