A researcher is designing an experiment, and ensures that each participant is equally likely to be in one condition as another. He does not assign them based on any characteristics such as gender, ethnicity, or personality.
This researcher is ________ participants.
a. randomly assigning
b. meta-analyzing
c. randomly selecting
d. generalizing
Question 2
Why is random assignment important in an experiment?
a. It assures that all participants take part in all conditions of a study.
b. It allows researchers to rule out individual differences as an alternative explanation.
c. It ensures that all participants see the same manipulation of the independent variable.
d. It is an index of the probability that experimental results occurred by chance.
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