Schematic depiction of the fMRI experimental paradigm and examples of two types of stimuli.

<p>Upper panel: fMRI experimental paradigm (only the first run is shown); lower panel: examples of two types of stimuli presented in the LFF or RFF. +: fixation point; a/a′ and b/b′: two paired characters lists, matched one-to-one for the numbers of strokes, radicals, and overall frequency.