Using Robust Normative Data to Investigate the Neuropsychology of Cognitive Aging

The extent to which increasing age is associated with impairment in cognitive function, termed cognitive aging, may have been overestimated in prior studies. The inclusion of individuals with severe or uncontrolled systemic medical illness or prodromal neurodegenerative disease in normal aging samples is likely to bias estimates toward lower cognitive performance and inflate estimates of variability. Unbiased estimates of cognitive aging in 658...