Which of the following would be the most concerning when conducting research in hospital or
pediatric settings?
A) Sample representativeness.
B) External validity.
C) Access to hard-to-locate populations, such as preterm infants.
D) How to keep track of your infants when they come back for "well baby" visits.
B
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Which of the following is true concerning establishing the time and place for exchanging tokens?
a. individuals should always have access to the token store b. individuals in the token economy should determine the time and place c. the time and place for token exchange should be planned in advance d. a specific time and place is only important when a large number of people are involved
Most effects of the amphetamines are produced by mimicking acetylcholine
a. True b. False Indicate whether the statement is true or false
Research on the genetic heritability of extraversion-introversion has made use of
A. brain electrical activity measures. B. the twin-study method. C. differences in sensitivity to stimulation. D. only twins that have been reared together (in the same environment).
When using the Wilcoxon tests, the obtained value must be ______ the critical value in order to establish statistical significance
a. less than or equal to b. greater than or equal to c. greater than d. equal to