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The averaged z‐statistic time course in the visual cortex using smoothed EPI data (solid red) and EPI data spatially smoothed by kernels with different widths. Among all EPI data, EPI smoothed by a kernel FWHM = 8.6 mm (solid magenta) has the maximal peak z‐statistic value. InI data filtered with the MA (2 s) filter (solid blue) has a even larger peak z‐statistic. [Color figure can be viewed in the online issue, which is available at wileyonlinelibrary.com.]
