POL222 - week 5

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4 Terms

1
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Two main steps in controlled experiment

  1. Researcher controls valid of X, then observes Y (addressing reverse causality)

  2. Researcher holds Z constant while changing X (addressing confounders)


2
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Randomized Controlled Experiment

Participants are randomly assigned to groups, ensuring that characteristics are balanced across groups, so confounding variables (observable or not) are held constant

3
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Arbitrary Assignment

Basically divides the room in half to determine who is in the treatment and control groups

4
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Randomized Assignment

Mixes everyone around to determine who is in the treatment and control groups