If differences in heredity were unimportant for differences in IQ scores, what should we expect?
a. IQ correlations should be equally high for monozygotic and dizygotic twins.
b. IQ correlations should be higher for dizygotic than monozygotic twins.
c. IQ correlations should be higher for monozygotic than dizygotic twins.
d. IQ correlations should be higher for twins reared apart than reared together.
a
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Which of the following research methods is most likely to demonstrate causal relationships between variables?
A) ethnography B) focus group C) survey D) experiment
Suppose a study reports findings that private school students do better academically compared to public school students,
where the researchers are looking at existing schools from both categories as the independent variable and grade point averages as the dependent variable. In this study, the researcher is making use of a a. quasi-experiment with a nonmanipulated independent variable. b. laboratory experiment with a high degree of internal validity. c. correlational study with no manipulations. d. descriptive study with no manipulations and measures.