Week+9_Experiment+Case+Study+Slides

Week+9_Experiment+Case+Study+Slides - true meaning of the...

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( See online summaries of four experiments for discussion ) Do these studies have the characteristics of a true experiment: - Pre- and post-testing? - Two levels of IV? - Controls for major threats to internal validity? Are measures reliable and valid ? Are results generalizable? What ethical concerns do these studies raise? Does the benefit outweigh the cost? CASE STUDIES
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Measurement Validity vs. Measurement Reliability Measurement Reliability Measurement Validity “Does my scale give me stable and consistent results?” “Does my scale measure what I intend to measure?” “Is it accurate?”
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A valid measure captures the
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Unformatted text preview: true meaning of the concept being measured, e.g.: Face validity : Does it seem accurate? Predictive validity : Does it predict to a future measure of the same concept ? Construct validity : Does it relate to other concepts in logical ways? Measurement Validity . Measurement Reliability Observed Measurement = True score + Measurement error Random error Error Measurement Reliability: A reliable measure is stable, consistent , & has little measurement error. Bad mood? A leading question? Typo?...
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Week+9_Experiment+Case+Study+Slides - true meaning of the...

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