Twin Studies Have Found That Some Psychological Traits, Such as Intelligence

question 137

Multiple Choice

Twin studies have found that some psychological traits, such as intelligence, have a notable genetic contribution. This can be concluded from what evidence?

• A)The similarity of identical twins is greater when they are reared apart than when they are reared together.
• B)The similarity of fraternal twins raised together is greater than the similarity of identical twins raised apart.
• C)The similarity of identical twins raised apart is greater than the similarityof fraternal twins raised apart.
• D)The similarity of identical twins is essentially equal to that of fraternal twins.

---

Definitions:

Learned Response

A reaction developed as a result of experience or practice, which differs from innate or reflexive responses not dependent on prior exposure.

Normal Vision

The standard state of visual acuity, typically defined as 20/20 vision, in which a person can see what an average individual is expected to see at 20 feet.

Happy

An emotional state characterized by feelings of joy, satisfaction, contentment, or positive well-being.

Ultimate Causes

Fundamental reasons behind biological or behavioral phenomena, often involving evolutionary explanations.