Assertion: dopamine's effect | /r/HasProperty | shiner et al.
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text: This effect of dopamine on performance, as opposed to learning, is consistent with findings of a number of studies in both humans (Frydman et al., 2011; Shiner et al., 2012; Smittenaar et al., 2012) and other animals (Berridge and Robinson, 1998; Cannon and Palmiter, 2003; Flagel et al., 2011; Berridge, 2012; Saunders and Robinson, 2012).