KEY FEATURES: A student-friendly writing style makes the content more approachable for readers to retain. Personal stories from fellows of the Association of Psychological Science (APS) convey to readers that even the most distinguished experts make mistakes that can be avoided through examination. Critical thinking questions give students the opportunity to reflect on preceding essays. Stories from all areas of psychology appeal to learners beyond subfields of psychology.

Manipulation Checks Can Ruin Your Study

Manipulation Checks Can Ruin Your Study

Ying-yi Hong

This essay is about a research mistake that I will never forget. Despite its happy ending, I still remember the experience vividly, probably because it was an emotional event that caused a lot of self-doubt and frustration. I learned such a powerful lesson from this mistake that I will never take common research practices for granted again. My mistake stemmed from a research practice called manipulation check, which is in general a good practice for most studies. Manipulation check refers to the assessment of whether the manipulation is effective. It often makes sense to assess whether a manipulation implemented does work; however, it did not work for my research, and it ...

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