One of the major limitations of observational research methods is that ____
a. they are not cost effective
b. behavior may be altered as a function of participants' awareness of being observed
c. results tend to be invalid
d. observation cannot be conducted in a structured way
b
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The research on adopted children and intelligence has found that there is a significant similarity between them and
a. their biological parents. b. their adoptive parents. c. both sets of parents. d. their adoptive siblings.
According to data presented in your text, which factor(s) contributes to the highest number of deaths annually in the United States?
a. poor diet and physical inactivity b. alcohol use c. illicit drug use d. smoking e. motor vehicle crashes
In the United States, an eight-year-old child would be most likely to die
a. from cancer. b. from some congenital abnormalities. c. as the result of a car accident. d. from child abuse.
A major methodological advancement in adult development research has been to favor:
A) cross-sectional over longitudinal designs. B) long-term longitudinal designs over sequential designs. C) cross-sectional over sequential designs. D) sequential designs over cross-sectional and long-term longitudinal designs.