Experiential factors include early- mid- and late-life (current) cognitive and physical activities, social engagement, social networks, and childhood adversity [31,56,68–72]. Affect includes measures of depressive symptoms [73,74]. Personality includes measures of neuroticism, extroversion, openness, agreeableness, conscientiousness, harm avoidance, novelty seeking, loneliness, and anxiety [75–78]. We assessed experiential well being with a measure of purpose in life [79,80]. Additional personality and well-being measures were added in 2010. Odor identification was assessed with the Brief Smell Identification Test [81]. We also assessed life space, an index of spatial mobility in the world [82].
