Monozygotic twins who are raised in different adoptive households would provide an opportunity to disentangle the relative effects of which two developmental factors?
A. genotypes and phenotypes
B. heredity and the environment
C. monozygotic and dizygotic influences
D. isolation and sociability
Answer: B
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If both variables are measured on a nominal scale, what type of correlation coefficient is appropriate?
a. Spearman's rank-order correlation coefficient b. Phi coefficient c. Point-biserial correlation coefficient d. None, because correlations cannot be computed on nominal data
Manuel hoped to graduate from college by age 22 but finds himself enrolling for the first time at age 52 . The anxiety Manuel feels because of this situation may be best explained by the concept of
a. biological maturation. b. a social clock. c. plasticity. d. historical change.
Gametes reproduce through a process called ______.
A. mitosis B. meiosis C. fertilization D. inheritance
The larger the F ratio:
a. the less likely we are to reject the null hypothesis. b. the less likely our results are due to chance. c. the greater the probability of a Type I error. d. the less likely there is a confound.