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A study on a specific psychological disorder found a concordance rate of 57% in identical twins and 22% in fraternal twins. Based on these findings, what is the most accurate conclusion about the development of this disorder?
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A study on a specific psychological disorder found a concordance rate of 57% in identical twins and 22% in fraternal twins. Based on these findings, what is the most accurate conclusion about the development of this disorder?
A large-scale study on obsessive-compulsive disorder (OCD) found that when one identical twin has the disorder, the other twin has a 57% chance of also having it. For fraternal twins, this chance is 22%. Based on these findings, what is the most logical conclusion about the development of OCD?