Insight in cognition: self-awareness of performance across cognitive domains.

Loss of cognitive functions, as apparent through self-awareness, is considered an important indicator of cognitive deficits and is therefore commonly used in clinical practice. However, little is known about self-awareness of cognitive performance, including its accuracy, its basis, and whether people can distinguish their performance across different cognitive domains. In the present study, 20 university students (M age=21.7 +/- 2.2 years, 9 males) and 20 middle-aged participants (M age=52.8 +/- 3.9 years, 10 males) gave estimations of their performances on executive functioning, memory, attention, and visuoperception before and after confrontation with their capacities. A repeated-measures analysis of variance with age group as a between-subjects factor was performed on the calculated estimation errors, before and after neuropsychological testing. Overall, the estimation errors were significantly higher before than after experience with test performance, ps<.01, partial (2)s=.17. An overall effect of domain (four levels), ps<.001, partial (2)s=.22 was found. These results suggest that self-awareness is domain-specific, and although it is adaptive to the experience of mental effort, it is most dependent on preexisting beliefs about one's own cognitive abilities.