Table 5.

Mean (SD) item and source memory performance for younger and older adult groups

	Young adults		Older adults
	Faces	Scenes	Faces	Scenes
Item hit rate	0.82 (0.15)	0.81 (0.15)	0.70 (0.17)	0.66 (0.14)
False alarm rate	0.13 (0.10)	0.13 (0.10)
Proportion source correct	0.83 (0.14)	0.79 (0.16)	0.75 (0.13)	0.68 (0.13)
Proportion source incorrect	0.05 (0.04)	0.06 (0.05)	0.14 (0.07)	0.18 (0.10)
Proportion source don’t know	0.12 (0.13)	0.16 (0.13)	0.12 (0.12)	0.14 (0.13)
Item memory	0.69 (0.18)	0.67 (0.17)	0.56 (0.14)	0.52 (0.13)
Source memory (pSR)	0.68 (0.18)		0.51 (0.16)

Item memory computed as the difference between hit and false alarm rates.

Source memory computed using the single high-threshold model described in Materials and Methods, Data acquisition and analysis, Behavioral data analysis.