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Mean accuracy rates during various frequency stimulations for all consulted age groups (light grey bar: group 1 (⌀ 6.73 yrs); left hatched bar: group 2 (⌀ 8.08 yrs); right hatched bar: group 3 (⌀ 9.86 yrs); dark grey bar: group 4 (⌀ 22.36 yrs)). The star depicts significant group differences.
