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Performance on 2-back tasks. Percentage of hits on the 2-back tasks in young, middle-aged, and older adults. Boxplots indicate medians (horizontal line between dark gray and light gray box) and the 75th (top of box) and 25th (bottom of box) percentile ranges; the whiskers indicate full ranges. Note that visuospatial and verbal data were pooled. *p < 0.05.
