Scientists have published the results of many years of experiment, the launch of which was given in the 1930s of the last century. An attempt was made to associate different qualities of a person and their impact on life expectancy.
Only the study involved 600 people aged 20 years. Friends of the participants of the experiment were to characterize the identity of the examinee. After 75 years, scientists have compared these characteristics with a lifespan of volunteers.
Honest and open people lived the rich and long life. Especially, this phenomenon was expressed in the group of men.
Among women longevity differed friendly and even-tempered personality.