FLAGSTAFF, Arizona, Jan. 18 (TNSjou) -- Northern Arizona University issued the following news: For decades, scientists have been trying to identify early signs of memory impairment in adults in an attempt to screen for or even slow down the onset of cognitive decline. Some clinicians believe that major personality changes, such as an increase in neuroticism, could be a canary in the coal mine for Alzheimer's disease and other types of dementia. But one sociologist is telling those clinicians:   more