There is an interesting new study published this week in the journal JAMA Neurology that analyzed data from in-depth neuropsychological tests and interviews with nearly 3,500 people over age 65 enrolled in the Health and Retirement Study, a long-term research project sponsored by the National Institute on Aging and the Social Security Administration. For anyone who worries about dementia, this is a good read.
Here is a link to an article that describes the study.