Assignment: Morning Exercise Effects

Assignment: Morning Exercise Effects

Assignment: Morning Exercise Effects

Imagine that you are a participant in an experiment on the effects of morning exercise on mathematics performance. If this study uses a within-subjects design, which of the following would you do?
a. One day you take a math test after having exercised in the morning; another day you take a math test after not having exercised in the morning.
b. Either you exercise in the morning and then take a math test or you do not exercise in the morning and then take a math test.
c. You eat a healthy breakfast consisting of milk, juice, toast, and eggs.
d. You take a math test and then tell the researcher whether or not you exercised that morning.
36. Imagine an experiment with one independent variable: noise level (quiet vs. noisy). If the researcher is using a between-subjects design and wants to have 20 participants per condition, how many participants will he need all together?
a. 10
b. 20
c. 40
d. 400
37. What is the main advantage of conducting an experiment using a within-subjects design rather than a between-subjects design?
a. A within-subjects design eliminates the need for pilot testing.
b. A within-subjects design controls more extraneous variables.
c. A within-subjects design does not require manipulation of an independent variable.
d. A within-subjects design prevents carryover effects.
38. A researcher is conducting a study in which the dependent variable is mental concentration. If it is a within-subjects design with lots of different conditions, then which of the following is most likely to be a problem for the researcher?
a. practice effect
b. fatigue effect
c. context effect
d. floor effect

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39. Experimenters manipulate independent variables and control extraneous variables.
a. True
b. False
40. In a between-subjects experiment, each participant is tested in only one condition.
a. True
b. False
41. In a within-subjects experiment, each participant is tested in more than one condition.
a. True
b. False
42. Researcher Robert Rosenthal is known for his work on which of the following?
a. the effect of smiling on helping
b. cultural differences in time perception
c. social anxiety
d. experimenter expectancy effects
43. What is the defining feature of nonexperimental research?
a. It is about personality and individual differences.
b. It lacks the manipulation of an independent variable, random assignment, or both.
c. It involves only one variable.
d. It has high external validity.