Which technique ensures that personal characteristics that might affect the outcome of an experiment are scattered among research participants in the different groups, thereby making the groups roughly equivalent?
A. dependent recursion
B. random assignment
C. independent assignment
D. regression to the mean
Answer: B
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According to Shelp, the necessary components of courage are freedom of choice, fear of a situation, and ______.
A. competence B. feeling empathetic C. willingness to take risk D. disregard for one’s own well-being
Which of the following statements best supports facial expressions of emotion as being innate?
A. Infants soon begin to imitate the facial expressions of those around them. B. The pattern of facial movements we call a "smile" is universally related to positive emotions. C. When playing some games of chance, many people master the skill of hiding their emotions from the other players. D. Sticking your tongue out at someone means surprise in China and resentment in North America.
Your textbook presents three different types of descriptive statistics. Which of the following is, in fact, an example of an inferential statistic?
a. Measures of normal and skewed distributions b. Measures of central tendency c. Measures of variability d. Frequency distributions
While no research hypothesis is ever definitely false, failing to reject the null hypothesis in a study that has a high level of power allows one to
A) suspect that the research hypothesis may still be true. B) conclude that the research hypothesis is most likely false. C) make no statements about the research hypothesis. D) reject the notion that the effect size has anything to do with statistical significance.