A clinical psychologist proposes to test the effectiveness of a treatment on reducing depressive symptoms. She proposes to administer the treatment to one group and assign the other group of participants to a wait list
This experimental design has _________ levels.
a) two: treatment vs no treatmen
b) one: treatment
c) three: treatment vs no treatment vs dependent variable
d) four: treatment vs no treatment vs dependent variable vs extraneous variable
A
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In a longitudinal design, researchers study
A) the same group of participants repeatedly at different ages. B) groups of participants differing in age at the same point in time. C) participants over the same ages but in different years. D) participants of the same age at the same point in time.
According to the serial-position effect, if you are shown a list of items and then asked to immediately recall them, you will most easily recall items:
a. from the beginning and the middle of the list. b. from the beginning and the end of the list. c. from the middle and the end of the list. d. only from the beginning of the list.