I speculate that the first study you mentioned (PEW) had the lowest result of the 3 in that while their maximum bound of 120 is a very high age to reach, it is still within the age range that humans can realistically picture. Moreover, since it had also mentioned realistic age ranges, such as the 80s and 90s, the people taking it may have been more wary of consequences of aging that they actually see in real life, such as illness and cognitive decline.
The second study, at least from the abstract I read, was more general about the way in which they framed l... (read more)
I speculate that the first study you mentioned (PEW) had the lowest result of the 3 in that while their maximum bound of 120 is a very high age to reach, it is still within the age range that humans can realistically picture. Moreover, since it had also mentioned realistic age ranges, such as the 80s and 90s, the people taking it may have been more wary of consequences of aging that they actually see in real life, such as illness and cognitive decline.
The second study, at least from the abstract I read, was more general about the way in which they framed l... (read more)