Cognitive Research: Principles and Implications

Table 3 Proportion of participants’ responses referencing dimensions as a function of question, age, study, and dimension in Waves 1 and 2 (standard error of the mean in parentheses)

From: Ecological validity of don’t remember and don’t know for distinguishing accessibility- versus availability-based retrieval failures in older and younger adults: knowledge for news events

	Wave 1				Wave 2
	OA		YA		OA		YA
	DR	DK	DR	DK	DR	DK	DR	DK
Accessibility	.65 (.09)	.04 (.04)	.79 (.08)	.03 (.03)	.57 (.07)	.03 (.03)	.88 (.07)	.03 (.03)
Never	.00 (.00)	.87 (.07)	.00 (.00)	.91 (.06)	.00 (.00)	.80 (.07)	.00 (.00)	.93 (.05)
Forgetting	.52 (.11)	.00 (.03)	.49 (.09)	.00 (.02)	.46 (.09)	.00 (.02)	.50 (.08)	.05 (.02)
Availability	.96 (.03)	.96 (.06)	1.00 (.02)	.97 (.05)	.97 (.02)	.83 (.05)	1.00 (.02)	.93 (.04)

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