Table 1.

Mean concealed knowledge effect on accuracy in percent correct (irrelevant-probe) for the familiar-probe test

Probe Study	Delay
	10 min	24 h	1 week
Deep	3.3% (1.0%)	7.9% (1.2%)	3.3% (0.8%)
Shallow	4.3% (2.0%)	3.8% (1.0%)	3.2% (1.3%)

Positive values indicate that probe responses were less accurate than irrelevant responses. Data are shown as a function of delay and probe study condition

Values in parentheses are 1 ± SEM