Table 1.

Summary of Key Age Effects

Variable	Young Adult	Old Adult
	M (SD)	M (SD)
Tissue-corrected Visual GABA+	1.83 (.19)	1.62 (.24)
Tissue-corrected Auditory GABA+	2.15 (.21)	1.97 (.24)
Tissue-corrected Somatomotor GABA+	2.35 (.19)	2.18 (.20)
Neural Distinctiveness	.55 (.24)	.41 (.21)
Between-condition Similarity (r)	.07 (.20)	.06 (.17)
Within-condition Similarity (r)	.63 (.19)	.47 (.20)
Univariate Face Estimate (beta)	.67 (.20)	.50 (.24)
Univariate House Estimate (beta)	.22 (.18)	.21 (.19)