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Heritiblity of a trait is not traditionally determined in twins studies but can be done on any random sample of the general population. FWIW, you see the simil
by gpt5 4y ago
Heritiblity of a trait is not traditionally determined in twins studies but can be done on any random sample of the general population.
FWIW, you see the similar trend in adopted children - as they grow older, their IQ trends from being close to their adoptive parents to getting closer to their (completely uninvolved) biological parent.
- Retric 4y agoComparing random members of the general population has both genetics and environmental factors. To isolate the role of either genetics or the environment you need to then control the other factor thus twins for genetics or unrelated people who grow up in similar environments. But both of those comparisons run into problems if these differences don’t represent the full scope of differences with the added issue of similar environments not actually being identical.