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8

Heritability estimates of Extraversion (and other Big 5 factors) The introduction section of Loehlin et al (1998) provides a narrative review of heritability estimates of big 5 personality traits (i.e., one of which is extraversion). A brief extract gives a flavour of some of the research that has been conducted: A recent heritability analysis of the ...


8

Monozygotic twin studies are the general course of action for this kind of question. Genetic and environmental influences on multiple dimensions of religiosity: a twin study concludes there is a genetic component. A complete approach for these kind of studies is to take twins that have been separated to different households from birth and compare them to ...


6

psychological sequelae might be a word you're looking for if you forgive that it's somehow still neurobiological; it is however, not genetic or developmental or something somebody was born with: Chronic kidney disease, for example, is sometimes a sequela of diabetes, and neck pain is a common sequela of whiplash or other trauma to the cervical vertebrae. ...


6

To learn about other twins reared apart, investigate the earlier Minnesota Study of Twins Reared Apart and the ongoing Minnesota Twin Family Study. To pique your curiosity: Jim Lewis and Jim Springer stand out in the Minnesota Study of Twins Reared Apart because some of their two histories were strikingly identical; several notable examples: 1st wife: ...


5

The Dark Triad traits you speak of are subclinical personality traits, therefore they cannot be diagnosed. Everyone carries some of the characteristics of these traits. People high on these traits are also not considered to be defective, even better they may in some environments be considered to be an advantage (e.g., business areas). You may want to read ...


5

As I alluded in the comments, I think your question is underpinned by a more fundamental worry of the "best level of description" for psychological phenomena. If you a reductionist then you believe that all of psychology is best explained in terms of the activity of neurons (or systems of neurons if you are of the system perspective; note that some do not ...


2

This is my own conjecture: I would think a Nature/neurobiological/genetic disorder would be classified as some sort of "Structural Disorder." Maybe the Nurture side would be something like "Processing Disorder"? (this is assuming we're talking maladaptive effects) Is our science even to a point where we can differentiate between a neurobiological ...


1

Thing is, when we look at something for a while, it influences us to, in some ways, follow it. If I am not mistaken, a similar principle works for yawning and how a person can yawn just by looking at someone else who does. I wish to elucidate with a personal experience. In my high school, there was this girl with amazing handwriting. I got down with the pox ...



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