The phrase "adulthood of both" is not correct and sounds awkward in written English.
It may be intended to refer to the state of being an adult for two individuals, but it lacks clarity and proper structure.
Example: "The adulthood of both individuals was marked by significant personal growth and responsibility."
Alternatives: "the maturity of both" or "the adulthood of each".
This inchoate tendency appears to foreshadow the full expression of authoritarianism in adulthood -- both the lack of openness to new ideas and the strict reliance on automatic, mindless judgments and decision making.
This suggests that in the period between infancy and adulthood individuals of both species come to integrate their gaze-following skills with their more general social-cognitive knowledge about other animate beings and their behaviour, and so become able to deploy their gaze-following skills in a more flexible manner.
To address whether the GDDs required to reach adulthood at all sites were similar between Alexander and Hilliard's and our current survey, we regressed the average GDDs associated with the timing to adulthood of each species between both survey periods for each site.
Only with the adulthood of egoism do individuals escape both material (external) and spiritual (internal) constraints, learning to value their personal satisfaction above all other considerations.
Early life parental death was classified on a three point scale as no parental death before adulthood, death of one parent before adulthood and death of both parents before adulthood.
"We're in the adulthood of the Reagan youth.
We see incidents from the childhood, adolescence and adulthood of father and son.
Why, you might wonder, are newspapers speculating about the fictional adulthood of a fictional child?
Numerous Conservative and Reform congregations have instituted a separate ceremony to mark the adulthood of girls, called Bat Mitzvah.
A lot of her friends in the film are very much play acting a version of adulthood, of maturity.
