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. 2003 Dec 1;100(25):15280–15283. doi: 10.1073/pnas.2535780100

Fig. 3.

Fig. 3.

Magnitude of learning (response to the CS+ minus the response to the CS-). (a) The magnitude of learning expressed through UCS expectancy was significantly greater on perceived than unperceived trials. (b) In contrast, the magnitude of SCR conditioning was similar on perceived and unperceived trials. These results demonstrate equivalent CR expression with and without awareness. The asterisk indicates significance at P < 0.05.