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. Author manuscript; available in PMC: 2008 Jul 10.
Published in final edited form as: Biol Psychiatry. 2005 Feb 15;57(4):319–327. doi: 10.1016/j.biopsych.2004.11.026

Figure 2.

Figure 2

Overall effect of task manipulation. Mean accuracy (A), reaction time (B), response bias (C), and discriminability (D) for the entire sample (n = 62). Error bars represent standard errors. For accuracy and RT, the rich condition (black bars) refers to the stimulus associated with more frequent reward, whereas the lean condition (light gray bars) refers to the stimulus associated with less frequent reward.