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. Author manuscript; available in PMC: 2009 Nov 3.
Published in final edited form as: Behav Brain Res. 2008 May 8;193(1):79–86. doi: 10.1016/j.bbr.2008.04.028

Figure 2. Declarative Verbal Memory Task.

Figure 2

Verbal memory performance in Placebo (black bar), Nap (striped bar), and Caffeine groups (grey bar) (means and standard errors), with p-values of significant group differences. 7hr retention of Morning Words in Recall (2a) and Recognition in d’ (2b), 20min retention of Evening Words in Recall (2c) and Recognition in d’ (2d).