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Concordance rates show the likelihood that if one member of a pair has a particular trait,...

Concordance rates show the likelihood that if one member of a pair has a particular trait, the other member of the pair also has it.

a. True

b. False

Social-Sciences   Psychology   
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Answer #1

a. true

In a random sample of pairs, the proportion of pairs where both individuals share a certain characteristic. Often used in twin studies to determine the extent to which a certain gene or group of genes is responsible for a certain trait, such as homosexuality.

Example: In a pair of identical twins, if one twin has schizophrenia, the other is about 50% likely to be diagnosed with the disease at some point. In fraternal twins, the concordance rate for schizophrenia drops to about 15%. Therefore, genetics are partially to blame for schizophrenia, though not entirely, or the concordance rate for identical twins would be 100%.

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