Twin Studies

question 107

Multiple Choice

Twin studies

• A) cannot be used to study polygenic traits such as intelligence.
• B) are based on the assumption that monozygotic twins are not more similar genetically than dizygotic twins.
• C) are based on the assumption that heredity influences a trait if identical twins are more alike than fraternal twins.
• D) often underestimate the influence of heredity because identical twins may have more similar environments than fraternal twins.

---

Definitions:

Unconscious Conflict

Psychological struggles within the unconscious mind, often stemming from repressed thoughts or feelings, that can influence behavior and emotions.

Id

In psychoanalytic theory, the part of the human personality that is driven by innate instinctual impulses and primary processes.

Superego

In psychoanalytic theory, the part of the personality that represents internalized ideals and provides standards for judgment and future aspirations.

Humanistic Psychologists

Psychologists who focus on the individual's potential for personal growth and the importance of self-perception in understanding behavior.