• AD Patients tended to overestimated their performance on the BCRP and RAVLT, while memory-impaired and control subjects showed a slight tendency to underestimated their performance. The discrepancy between postdiction and actual scores on the BCRP and RAVLT across groups was not significantly correlated with delayed recall, self-report memory change, informant report of memory change, the discrepancy between self- and informant report of memory change, intrusions or the proportion of correct intrusions. The AD subjects were not fully aware of their memory deficits. Here, ABCG2 is linked to Alzheimer disease.