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Check out [1] - Top 10 Replicated Findings From Behavioral Genetics In particular, "all psychological traits show significant and substantial genetic influence

by tomp 9y ago

Check out [1] - Top 10 Replicated Findings From Behavioral Genetics In particular, "all psychological traits show significant and substantial genetic influence" mostly contradicts your comment, also "the heritability of intelligence increases throughout development" - i.e. environmental factors (parenting) matter when kids is young, but less so when they turn into adults. [1] https://www.gwern.net/docs/genetics/2016-plomin.pdf https://www.gwern.net/docs/genetics/2016-plomin.pdf

belorn 9y ago
from the abstract: Finally, we note that 4 of the top 10 findings (Findings 2, 7, 8, and 9) are about environmental influences rather than genetic influences. Via genetically sensitive designs such as twin studies, behavioral genetics has revealed almost as much about the environment as about genetics. You have to elaborate a bit more if your claim is that this paper disprove environmental influences. A second key aspect from the abstract: Most important, heritability does not imply immutability (Plominet al., 2013).
- tomp 9y ago
  > You have to elaborate a bit more if your claim is that this paper disprove environmental influences. Not at all, but I think it disproves this part: > but alone the genetic factor tend to have no effect
  - belorn 9y ago
    I disagree. Take the immutability aspect highlighted. Without environmental influences, how do you cause a change? Genes can technically change during life, but I doubt thats what the study referees. The idea that genes dictate outcomes in immutable ways is exactly what the authors of this study disagree with. To make a direct example on the study of a particular gene and depression. If you take a person with this gene, they have (if i recall right) 6 times higher risk factor for depression compared to other people, but only if they also have had a child hood trauma. People with the gene and no such trauma has no higher risk for depression than people without the gene and no trauma. The gene has a environmental aspect to it. Page 5: For example, a heritability of nearly 100% implies that environmental differences that exist in the population do not have an effect on a particular phenotype assessed at a particular stage in development. Title: Finding 2. No traits are 100% heritable. Although heritability estimates are significantly greater than 0%, they are also significantly less than 100%. As noted earlier, heritability estimates are substantial between 30% and 50%, The study is very clear here. Environmental influences are estimated to be between 70% and 50%, and never as low as 0% for any single trait. Further more on page 6: Many others have noted that no traits are 100% heritable (e.g., Plomin, 1989; Turkheimer, 2000). My original claim was that alone the genetic factor tend to have no effect, ie, no genetic factor gives 100% heritability for a trait in behavioral science. This study support this claim. I am sorry to say that either you read the study wrong or you misinterpreted my comment.
    - tomp 9y ago
      Definitely misinterpreted your comment. My interpretation of "no effect" is 0%, not <100%. Looks like we're mostly in agreement.

by tomp 9y ago

belorn 9y ago

from the abstract: Finally, we note that 4 of the top 10 findings (Findings 2, 7, 8, and 9) are about environmental influences rather than genetic influences. Via genetically sensitive designs such as twin studies, behavioral genetics has revealed almost as much about the environment as about genetics. You have to elaborate a bit more if your claim is that this paper disprove environmental influences. A second key aspect from the abstract: Most important, heritability does not imply immutability (Plominet al., 2013).

tomp 9y ago
> You have to elaborate a bit more if your claim is that this paper disprove environmental influences. Not at all, but I think it disproves this part: > but alone the genetic factor tend to have no effect
- belorn 9y ago
  I disagree. Take the immutability aspect highlighted. Without environmental influences, how do you cause a change? Genes can technically change during life, but I doubt thats what the study referees. The idea that genes dictate outcomes in immutable ways is exactly what the authors of this study disagree with. To make a direct example on the study of a particular gene and depression. If you take a person with this gene, they have (if i recall right) 6 times higher risk factor for depression compared to other people, but only if they also have had a child hood trauma. People with the gene and no such trauma has no higher risk for depression than people without the gene and no trauma. The gene has a environmental aspect to it. Page 5: For example, a heritability of nearly 100% implies that environmental differences that exist in the population do not have an effect on a particular phenotype assessed at a particular stage in development. Title: Finding 2. No traits are 100% heritable. Although heritability estimates are significantly greater than 0%, they are also significantly less than 100%. As noted earlier, heritability estimates are substantial between 30% and 50%, The study is very clear here. Environmental influences are estimated to be between 70% and 50%, and never as low as 0% for any single trait. Further more on page 6: Many others have noted that no traits are 100% heritable (e.g., Plomin, 1989; Turkheimer, 2000). My original claim was that alone the genetic factor tend to have no effect, ie, no genetic factor gives 100% heritability for a trait in behavioral science. This study support this claim. I am sorry to say that either you read the study wrong or you misinterpreted my comment.
  - tomp 9y ago
    Definitely misinterpreted your comment. My interpretation of "no effect" is 0%, not <100%. Looks like we're mostly in agreement.