If a teratogen interferes with prenatal development only during a particular period of time, the period of development in which the teratogen can exert its effect is called:
a. a teratogenic period
b. a teratogenic stage
c. a critical period
d. a high-risk – low-reward stage
c
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According to the discussion of infertility,
a. the definition of infertility is failure to conceive after 6 months of sexual intercourse without using contraception. b. approximately 15% of couples in the United States are infertile. c. in the current era, few couples who are infertile find this to be a worrisome problem. d. most infertility can be traced to a psychological cause.
If researchers reported that, for a correlated-groups design, t(20) = 3.57, p <.05, you can conclude that:
a. the null hypothesis should be rejected. b. you should fail to reject the null hypothesis. c. the alternative hypothesis was incorrect. d. the study needs to be repeated.
Which STD is most prevalent in the United States?
a. HIV b. genital herpes c. gonorrhea d. chlamydia
Which of the following describes the purpose of an institutional review board (IRB)?
a. Reviewing proposals for research involving human participants b. Determining if research should receive a federal grant c. Providing research participants with a full debriefing d. Summarizing the findings of a research experiment