recollection and familiarity in recognition memory adult age differences and neuropsychological test correlates dual process theories account for agerelated changes in memory by proposing that old age is associated with deficits in recollection together with invariance in familiarity the authors evaluated this proposal in recognition by examining recollection and familiarity estimates in young and older adults across 3 process estimation methods inclusionexclusion rememberknow and receiver operating characteristics roc consistent with a previous literature review light prull lavoie healy 2000 the authors found age invariance in familiarity when process estimates were derived from the inclusionexclusion method but the authors found age differences favoring the young when familiarity estimates were derived from the rememberknow and roc methods recollection estimates were lower for older adults in all 3 methods recollection and familiarity had variable relationships with frontal and temporallobe measures of neuropsychological functioning in older adults depending on which method was used to generate process estimates these data suggest that although recollection deficits appear to be the rule in aging not all estimates of familiarity show age invariance