Foveal crowding modifies a target's properties under a brief presentation time.

Finally, when we examined the effects of BM (i.e., compared accuracy with and without BM, Table 6 ), for each ISI after averaging across presentation time (because there was no ISI × Presentation time interaction), with a black matrix a significant difference in discrimination occurred only at short ISIs (20 and 40 ms, although after Bonferroni correction it was only marginally significant).

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