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A comment on Teens Aren’t Partying Anymore. Parent comment

Re:Teens Aren’t Partying Anymore by jhbadger on Wednesday January 03, 2018 @10:17AM (#16061616)
"Heritable" definitely means genetic when used in a technical rather than a casual sense, though. Studies control for environment by looking at, for example, identical twins adopted by different families.
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Re:Teens Aren’t Partying Anymore by rcacho on Wednesday January 03, 2018 @01:05PM (#16063320)
Heritability refers to trait variation due to genetic variation within a population.

This is different than the amount genetics actually contributes to a trait.

While you are controlling for environmental factors in heritability studies you are still referring to a specific population. It can be the case that two identical genotypes across two different populations show two different phenotypes.

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