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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 ...


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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