Growth mindset of aging (MA) refers to the belief that aging processes are malleable, while fixed MA is the belief that how one ages is predetermined and unchangeable. Using experimental methods, we manipulated MA and explored its impact on implicit old-age attitudes and self-perceptions of aging. Eighty-six older adults were randomly placed into a growth or fixed MA condition. Next, we assessed implicit old-age attitudes and self-perceptions of aging. The experimental manipulation was successful in that group MA scores differed, but MA did not significantly influence implicit old-age attitudes or self-perceptions of aging. However, a regression analysis revealed a novel finding: More growth MA was related to less negative implicit old-age attitudes and more positive self-perceptions of aging. These findings are an important contribution to the MA literature, which is in its infancy.

The amount of physical activity reported using accelerometry can vary depending on the method used. This study examined variability in four different methods of calculating moderate to vigorous physical activity (MVPA) among older adults, as well as lifestyle correlates of physical activity. The MVPA data were captured (n = 111; Mage = 70.3 years, SDage = 6.3) using waist-worn ActiGraph wGT3X-BT monitors and examined using 10-min bouted versus sporadic methods, and with cut points calibrated to older and younger adults. The sample, on average, did not meet national guidelines of 150 min/week of MVPA when using bouted methods, irrespective of cut point used. This was not the case for sporadic MVPA. More physical activity was reported for participants with two or more physical hobbies, but no association with social behavior was found. These results demonstrate the wide variability possible in reporting methods for accelerometry data and their relation to adherence rates for national health recommendations.