Great point. The perspective you have for life, its what matters the most.. to do this research well they should detect different "life philosophies" or paradigms.. like "materialist type", "spiritual type", "dionisiac type", "apolinian type".. etc..
and also measure them in diferent points in life..
for instance, when younger is cool to be dionisiac.. you will be happy than.. but as you grow up.. different things matter most.. and or you will shift paradigms or you will get more unhapier with time. As a example of why do periodic research based in paradigms is important..
I think this is a complex matter to be viewed so trivially.. i dont think it proves much anything of value, in the way this research was conducted.
for instance, when younger is cool to be dionisiac.. you will be happy than.. but as you grow up.. different things matter most.. and or you will shift paradigms or you will get more unhapier with time. As a example of why do periodic research based in paradigms is important..
I think this is a complex matter to be viewed so trivially.. i dont think it proves much anything of value, in the way this research was conducted.