What is the purpose of a twin study quizlet?

The purpose of twin and adoption studies is to investigate the relative influence of heredity(nature) and environment(nurture) on some aspect of psychological development.

What do twin studies indicate about the role of genes in personality quizlet?

What do twin studies indicate about the role of genes in personality? Dizygotic twins are more likely than monozygotic twins to share personality traits.

Which of the following best states why the study of twins is significant to the field of behavioral genetics?

Which of the following best states why the study of twins is significant to the field of behavioral genetics? If a psychological attribute is genetically influenced, then identical twins are more likely to share this attribute than are fraternal twins and other siblings.

In what brain structure would you expect to find a high percentage of acetylcholine receptors?

Given what you have learned about the brain, in what structure would you expect to find a high percentage of acetylcholine receptors?” efferent fibers.

What do adoption studies teach us that twin studies Cannot?

Twin studies are much better at studying the effects of nature (genes). High concordance between MZ twins tells us more about genetic influences than high concordance between children and their biological parents. On the other hand, adoption studies are much better at studying the effects of nurture (upbringing).

What is the purpose of twin study?

Twin studies allow disentanglement of the shared genetic and environmental factors for the trait of interest. Researchers can estimate the proportion of variance in a trait attributable to genetic variation versus the proportion that is due to shared environment or unshared environment.

What have studies of twins indicated about the causes of personality development quizlet?

What have studies of twins indicated about the causes of personality development? Many genes contribute to differences in the major personality traits. They looked for correlated words to describe personality in the English language.

What was the initial basis for identifying the Big Five personality traits?

Terms in this set (26) what was the initial basis for identifying the “big five” personality traits? neuroticism , extroversion, openness to new experiences, agreeableness, and conscientiousness.

Why are twin studies unethical?

The study, which has since been criticized for being unethical — for example, neither the children’s biological parents nor the adopting families were informed — was an attempt to get at the central psychological questions of “nature versus nurture” and the “twinning reaction.”

How does genetics and environment influence the similarities and differences within twins?

Any differences between identical twins is expected to be due to environmental factors since they are genetically identical, whereas fraternal twins only share half of their genes on average. When a genetic influence is dominant, the identical twins would have more trait similarity than fraternal twins.

What is an example of acetylcholine?

In the peripheral nervous system, when a nerve impulse arrives at the terminal of a motor neuron, acetylcholine is released into the neuromuscular junction. The nicotinic acetylcholine receptor is an example of a ligand-gated ion channel.

How are family studies related to twin studies?

Family studies are not as oft cited as twin and adoption studies, but nonetheless they are still a valid and important piece in the puzzle of heredity versus the environment. Family studies are mostly used to identify the degree of risk of relatives developing mental disorders that other family members suffer from.

What kind of studies are done on adoption?

Twin, family, and adoption studies have been the primary source of information on the relative importance of genetic effects (‘heritability’) for personality. Behavioral geneticists study the similarity of individuals who share genes and environments to different degrees to quantify heritability.

What is the purpose of a family study?

Family studies are mostly used to identify the degree of risk of relatives developing mental disorders that other family members suffer from. Case-control family studies are employed, including estimates of relative risk and population relative risk of a mental illness.

Are there any adoption studies that involve twins?

Because you also look at twin studies, it’s easy to get muddled up and think that adoption studies involve twins, one of whom has been adopted. That’s not so. Adoption studies don’t usually involve twins. These days, twins are almost always put up for adoption together and not separated.

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