Table 4.

Correlation between accuracy and regional blood flow in the caudate body and tail, putamen, and the hippocampus

	Accuracy
	First half	Second half
Right body tail	0.33	0.56*
Left body tail	0.19	0.47**
Right putamen	0.15	0.47**
Left putamen	0.16	0.49**
Right hippocampus	−0.55*	−0.24

^*p<0.05; ^**p<0.1 Accuracy was calculated in terms of consistency with the dominant category assignment for probabilistic stimuli. Responses to random stimuli were not included in the accuracy measure.