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9

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 ...


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 ...


7

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: ...


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. ...


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 ...


3

Short answer: Representations are a noteworthy controversy in embodied or situated psychological theories. Can we explain behavior without reference to representations? Long answer: Most modern theories presume that information is represented somewhere, such as the brain, and that behavior is organized because that somewhere is organized. ...


3

Just to help, here's an illustration of the sort of answer I'm looking for, though personally I'd be happy with any suggestions, even if less detailed than the first below. Long answer: On one hand, Pinker and Bloom (1990) argue that our language faculty is similar to our physical organs, in that they evolved as adaptations to evolutionary pressures. On the ...


2

Biondi et al. (1998) compared MR images of monozygotic twins and found that while the brains of monozygotic twins are not identical, they are similar. Relevant for understanding the concordance rate of schizophrenia in monozygotic twins, Suddath et al. (1990) examined MR images of monozygotic twins who where discordant for schizophrenia. They found that the ...


2

The Wikipedia article seems to provide a summary of this information with links to the primary literature http://en.wikipedia.org/wiki/Causes_of_schizophrenia#Genetics Concordance rates between monozygotic twins vary in different studies, approximately 50%; whereas dizygotic twins was 17%. Some twin studies (Koskenvuo et al; Hoeffer et al) have ...


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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