Explain how DZ and MZ twins are formed. Include a discussion of how twin studies help to inform the nature-nurture debate
What will be an ideal response?
Answer: DZ twins result when the female releases two eggs instead of one and each is fertilized with a sperm. MZ twins result when a zygote is formed and it divides. MZ twins share 100% of their genotype, whereas DZ twins share approximately 40–60% of their genetic inheritance. When MZ twins are more similar than DZ twins this indicates that genetics play a strong role.
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Which best illustrates gender segregation?
a. The fact that boys are better at spatial abilities than girls. b. Seeing one group consisting of all girls playing at one end of a gym and an all-boy group playing at the other end. c. The fact that girls are more emotional than boys. d. Seeing a sign that says both boys and girls can try out for the dance team.
If you square the correlational coefficient, you will get a number telling the
a. percent of variance accounted for by the correlation. b. standard deviations accounted for by the correlation. c. statistical significance of the measure. d. amount of causation between the two variables.
Which of the following areas of psychology is most likely to employ single-subject research?
a. social b. personality c. biopsychology d. sensation
In a qualitative research report, the Analysis section ______.
A. reports the statistical outcomes in a study B. evaluates the significance of outcomes in a study C. provides a series of interpretations that contributes a new perspective D. gives a brief overview of the purpose of the study