. Author manuscript; available in PMC: 2010 Mar 1.

Published in final edited form as: Psychol Aging. 2009 Mar;24(1):139–153. doi: 10.1037/a0014029

Table 2.

Regions of Interest (ROI) used to examine effects of Confidence Level (CONF: High or Low) and Recognition Accuracy (ACC: Correct or Incorrect) that showed greater activity during low confidence compared to high confidence trials.

Region	Coordinates	# Voxels	Main Effects	Interactions	Effects in Younger Adults Related to Interaction	Effects in Older Adults Related to Interaction
Left DLPFC	−39 21 24	190	CONF:F(1,30)=18.72, p<0.0002, η_p²=0.38	n.s.
Right DLPFC	39 36 27	49	CONF:F(1,30)=20.97, p<0.00008, η_p²=0.41	CONF × Age: F(1,30)=8.15, p<0.008, η_p²=0.21	CONF: F(1,15)=15.40, p<0.001, η_p²=0.51	CONF:F(1,15)=7.23, p<0.017, η_p²=0.33
Left VLPFC	−33 24 −6	134	CONF: F(1,30)=24.14, p<0.00003, η_p²=0.45	ACC × Age: F(1,30)=6.10, p<0.019, η_p²=0.17	ACC: F(1,15)=5.75, p<0.030, η_p²=0.28	ACC: n.s., η_p²=0.051
Right VLPFC	36 24 −9	229	CONF: F(1,30)=29.07, p<0.00001, η_p²=0.49	CONF × Age: F(1,30)=4.93, p<0.034, η_p²=0.14	CONF: F(1,16)=18.90, p<0.001, η_p²=0.56	CONF: F(1,16)=10.77, p<0.005, η_p²=0.42
				ACC × Age: F(1,30)=5.50, p<0.025, η_p²=0.16	ACC: F(1,15)=5.53, p<0.033, η_p²=0.27	ACC: n.s., η_p²=0.04
Anterior Cingulate Cortex	0 21 48	465	CONF: F(1,30)=46.76, p<0.00001, η_p²=0.70	CONF × Age: F(1,30)=6.68, p<0.015, η_p²=0.18	CONF: F(1,15)=30.23, p<0.00007, η_p²=0.67	CONF:F(1,15)=17.03, p<0.001, η_p²=0.53
			ACC: F(1,30)=4.19, P<0.049, η_p²=0.12	ACC × Age: F(1,30)=8.98, p<0.005, η_p²=0.23	ACC: F(1,15)=8.53, p<0.011, η_p²=0.36	ACC: n.s., η_p²=0.06
Left Inferior Parietal Lobule	−33 −57 48	333	CONF: F(1,30)=40.92, p<0.00001, η_p²=0.58	CONF × Age: F(1,30)=7.15, p<0.012, η_p²=0.19	CONF: F(1,16)=31.90, p<0.00005, η_p²=0.68	CONF: F(1,16)=9.76, p<0.007, η_p²=0.39
				ACC × Age: F(1,30)=4.43, p<0.044, η_p²=0.13	ACC: F(1,15)=4.27, p<0.056, η_p²=0.22	ACC: n.s., η_p²=0.031

Note: Main effects of condition (CONF, ACC) and interactions between conditions or group (Age: Younger or Older) from a Mixed ANOVA are reported. For significant interactions, results from relevant within groups ANOVAs are reported. Partial eta-squared (η_p²) values are reported as a measure of effect size.