Which one of the following is not a threat to the internal validity of an experiment?
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maturation |
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regression effect |
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random error |
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mortality
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An experiment in which extraneous variables are controlled is said to be
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internally reliable |
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internally valid |
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externally valid |
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externally reliable |
Using a convenience sample instead of a random sample of subjects is a threat to which kind of validity?
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internal |
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external |
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construct |
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statistical |
Any bias in selecting subjects for an experiment threatens the ____ of the experiment.
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internal validity |
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internal reliability |
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statistical validity |
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statistical reliability |