Which of the following students provides the most accurate information about the term validity?
a. Molly: "Validity measures the size of the gender difference on some task.".
b. Yuka: "Validity measures whether people earn the same score when they take the same test on two separate occasions.".
c. Luke: "Validity means that a test measures what it is supposed to measure.".
d. Bella: "Validity means that the testing situation was approximately the same for every person who takes the test.".
C
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A statistics class has 60% females and 40% males. A researcher selects a sample having 80% males and 20% females. Why should the researcher be cautious of making inferences about the entire class based on the sample?
a. Because the sample appears to be representative of the population. b. Because the sample appears to be unrepresentative of the population. c. Because the opinions of the females in the sample will not be the same as those of the females in the population. d. Because the sample was too small.
The behaviourism of John Watson has been described as _____ psychology.
A) animal B) stimulus–response C) subjective D) humanistic
A treatment based on weaning someone off their sleeping pills is designed for persons having which type of insomnia?
a. temporary insomnia b. chronic insomnia c. somatic insomnia d. drug-dependency insomnia