Suppose a Researcher Studied the Occurrence Rates of a Specific

question 8

Multiple Choice

Suppose a researcher studied the occurrence rates of a specific mental illness in monozygotic and dizygotic twins.She finds that in monozygotic twins,if one twin suffers from mental illness,the other twin is also likely to have the mental illness.However,this does not appear to apply to dizygotic twins.What conclusion should the researcher draw from this evidence?

• A)The incidence of this type of mental illness is strongly influenced by genetics.
• B)The incidence of this type of mental illness is primarily influenced by environmental factors.
• C)Monozygotic twins are at an increased risk of developing mental illness.
• D)Dizygotic twins are at an increased risk of developing mental illness.

---

Definitions:

Personality Differences

Variations in the patterns of thinking, feeling, and behaving that distinguish individuals from one another.

Situationism

The theory that behavior is determined more by situations than by personality traits.

Locus Of Control

A psychological concept that refers to individuals’ beliefs about the extent to which outcomes in their lives are under their own control versus external forces.

Reciprocal Determinism

The theory posited by Albert Bandura that a person's behavior both influences and is influenced by personal factors and the social environment.