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Title: A threat to internal validity that occurs when the instrument or dependent variable measures changes ... Post by: CTR on Apr 21, 2017 A threat to internal validity that occurs when the instrument or dependent variable measures changes during the experiment.
a. instrumentation b. testing effects c. time series effects d. experimental effects e. maturation effect Title: Re: A threat to internal validity that occurs when the instrument or dependent variable measures ... Post by: Atlantaer on Apr 21, 2017 Content hidden
Title: Re: A threat to internal validity that occurs when the instrument or dependent variable measures changes ... Post by: CTR on Jun 20, 2017 Thanks for the help
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