. Author manuscript; available in PMC: 2014 Jan 1.

Published in final edited form as: Neuropsychology. 2013 Jan;27(1):48–59. doi: 10.1037/a0030921

Table 2.

Correlation of regional brain volumes with age and search task performance: overall RT, visual load, cue validity, and alertness

Feature search						Conjunction search

Processing stream	ROIs	Age				ORGANIZED			DISORGANIZED			CUED							Alertness High load
			RT	Load		RT	Load		RT	Load		RT	Load		Validity		Cost		Alertness High load
				Diff RT	Z		Diff RT	Z		Diff RT	Z		Diff RT	Z	Diff RT	Z	Diff RT	Z	Diff RT	Z
dorsal	lPL	−.72	−.30			−.56	−.32		−.54	−.36	−.28^a	−.37				.30^a	.27^a	.38^a		−.28^a

	dlPFC	−.71	−.39			−.53	−.27		−.50	−.25	−.28^a	−38				.30^a		.35^a

	mPFC	−.64	−.32^a			−.46	−.25		−.43	−.34	−.25^a	−.38			.28^a	.29^a	.31^a	.29^a

ventral	VAA	−.35		−.34		−.25	−.28				−.27^a

	lTL	−.64				−.44	−.28		−.40			−.25							−.31	−.26^a

	mTL	−.28				−.35	−.29		−.29										−.42	−.33^a

	vlPFC	−.60	−.25^a			−.56	−.36	−.25^a	−.45			−.26						.31^a

subcortical	striatum	−.37	−.25^a			−.38	−.42		−.30		−.24^a	−.28	−.25^a

	thalamus	−.56	−.24^a			−.52	−.33		−.48			−.34						.29^a	−.31	−.31^a

corpus callosum	splenium	−.40			−.29^a	−.38	−.34		−.35	−.29^a									−.38	−.27^a

	parietal	−.46				−.35	−.31	−.38	−.28										−.29	−.31^a

	genu	−.47	−.32^a			−.38	−.29		−.36	−.32									−.34	−.52

Pearson’s correlation coefficients; significance level was p_{FDR-corrected}<0.05 corrected for multiple comparisons by controlling the false discovery rate (FDR) and, for additional information, values significant at p_uncorrected<0.05 are marked with an ^a; N=51.

Correlation values and significances held with partial correlations using MRI scanner (1.5T, 3T) as covariate; only the correlation between VAA volume / feature load (Diff RT) attenuated to r=−.23, p_uncorrected=0.05, and the correlation between mPFC volume / disorganized conjunction load (Z score) attenuated to r=−.22, p_uncorrected=0.06.

Abbreviations: RT=reaction time; Diff RT=difference RT value; Z=Z-transformed RT score; ROI= region of interest; VAA=visual association area, TL= temporal lobe, PL=parietal lobe, PFC=prefrontal cortex, l=lateral, dl=dorsolateral, vl=ventrolateral, m=medial.