About: Instructional manipulation check

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An instructional manipulation check, often abbreviated IMC, is a special kind of question inserted in a questionnaire among the regular questions, designed to check whether respondents are paying attention to the instructions. Discarding responses by participants who fail to read the instructions reduces the signal-to-noise ratio and can thereby increase the statistical power of an experiment. The tool was developed by Oppenheimer et al.

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  • An instructional manipulation check, often abbreviated IMC, is a special kind of question inserted in a questionnaire among the regular questions, designed to check whether respondents are paying attention to the instructions. Discarding responses by participants who fail to read the instructions reduces the signal-to-noise ratio and can thereby increase the statistical power of an experiment. The tool was developed by Oppenheimer et al. Eliminating random responses this way before performing statistical hypothesis testing may be considered a legitimate form of data manipulation, but should be duly mentioned in publications reporting on the outcome of the experiment in question. (en)
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  • An instructional manipulation check, often abbreviated IMC, is a special kind of question inserted in a questionnaire among the regular questions, designed to check whether respondents are paying attention to the instructions. Discarding responses by participants who fail to read the instructions reduces the signal-to-noise ratio and can thereby increase the statistical power of an experiment. The tool was developed by Oppenheimer et al. (en)
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  • Instructional manipulation check (en)
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