Explain how the twin design is used to separate influences of genes and environment on human behavior. What types of conclusions can be drawn from the different types of twin designs?
What will be an ideal response?
The ideal answer should include:
1. Identical twins share 100 percent of their genes and fraternal twins only 50 percent.
2. In comparison studies, if identical twins are more similar on a given physical or psychological trait than fraternal twins, it provides evidence that genes make an important contribution to that trait.
3. Because the environments of identical twins may be more similar than those of fraternal twins, the twins reared apart design is an important method of examining whether identical twins are still more similar than fraternal twins even when raised in different homes and cultural environments.
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Dissociative fugue is best described as ____
a. a generalized amnesia for one's identity and life history that may be accompanied by bewildered wandering or purposeless travel b. lack of memory for a specific event or events c. a condition in which two or more independent personality states appear to exist in one person d. feelings of unreality concerning the self and the environment
The most advanced stage of arm action in the throw is
A. no preparatory backswing B. a circular arm action in which the arm moves down and back C. bringing the object up beside the head by upward humerus flexion D. a circular overhead preparatory movement with the elbow extended E. a lateral swing backward
Why does hazing increase commitment to the group?
A. cognitive dissonance B. Stockholm syndrome C. maltreatment effects D. escalation trap
____ are formal customs that signify an individual's departure from childhood and his or her entrance into adolescence
a. Puberty rituals b. Psycho-cognitive stages c. History-graded norms d. Aging confirmations