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Primarily, a manipulation check is an indicator of the internal validity of an experiment. If the manipulation of your independent variable makes a statistically significant difference on the dependent variable, you have evidence for a causal effect of the manipulation. The manipulation check can give you more certainty that this effect is due to changes in ...


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It depends on what you mean by manipulation check. Manipulation check to filter participants: A manipulation check is usually done to verify that some experimental manipulation has had some preliminary effect. For example, in one of my studies I asked people to answer a personality test (a) honestly, (b) as an ideal worker, and (c) as the worst possible ...



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