Test-retest reliabilities and practice effect magnitudes were considered for nine computer-simulated tasks of everyday cognition and five traditional neuropsychological tests. The nine simulated everyday memory tests were from the Memory Assessment Clinic battery as follows: (1) simple reaction time while driving; (2) divided attention (driving while listening to the radio); (3) misplaced objects; (4) name-face association; (5) recognition of faces--signal detection; (6) recognition of faces--delayed non-match to sample; (7) telephone dialing; (8) first-last names; and (9) grocery list selective reminding. The traditional tests (Logical Memory and Paired Associate Learning from the Wechsler Memory Scale, Digit Span and Digit Symbol from the Wechsler Adult Intelligence Scale, and the Benton Visual Retention Test) were administered. Subjects were 56 male and 59 female volunteers aged between 17 and 82 years. Most measures show significant practice effects on reevaluation. Test-retest reliabilities of the computerized recall measures are equal or superior to the traditional memory tests, but the traditional measures of attention and concentration had reliabilities superior to the everyday tests. Test-retest reliabilities of everyday recognition memory tests were disappointing. Advantages of computerization of psychometric assessment and the need for multiple test forms are discussed. Two tables present study data. (SLD)