We examined the relationship of trait personality dimensions (negative affectivity and positive affectivity) on self-report of cognitive functioning. Ninety-six subjects who were screened to be without evidence of psychiatric or neurologic disorder, and who had previously completed the Tellegen Differential Personality Questionnaire (mean interval = 2 years) were sent a self-report questionnaire of cognitive functioning (MASQ). As predicted, negative affectivity (NA) was more strongly related to self-appraisal of cognitive functioning than was positive affectivity (PA); subjects with higher NA scores acknowledged more cognitive difficulties. Negative affectivity was also a stronger predictor of cognitive self-report than was self-report of current sad mood state. The implications of these findings for the examination of self-appraisal and accuracy of self-report are discussed.