Table 1.

Mean response time (in milliseconds) and error rate, respectively, in the test phase of the experiments in which reward was delivered for each of three training conditions: long training (1,008 trials) with low and high reward of 1¢ or 5¢ per trial, brief training (240 trials) with rewards of 2¢ and 10¢ per trial, and brief training followed by a delay of 4–21 d

	Distractor condition in the test phase
Training phase	None	Low value	High value
	665 (2.8)	673 (2.8)	681 (2.6)
1,008 trials	0.11 (0.004)	0.10 (0.004)	0.11 (0.004)
	667 (2.0)	675 (3.0)	682 (2.9)
240 trials	0.12 (0.005)	0.12 (0.006)	0.12 (0.006)
	614 (1.8)	624 (2.7)	630 (3.3)
4–21 d ago	0.06 (0.004)	0.07 (0.006)	0.08 (0.005)

The error terms, in parentheses, reflect the within-subjects SEM.