PNB 3RM3 Lecture Notes - Lecture 25: Research Question

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Assign participants into groups based on performance on matching variables. Matched groups - more than two levels of independent variable. Or can be something related to it that might provide alternate explanation for what i find. Same thing, but means you have two levels of independent variable. Tipping off your participants - you don"t want them to know, which could happen if you give participant dv more than once. Select a matching variable that isn"t your dv (something correlated) Assign people to groups based on pre-existing experience they have. Firefighters in new york vs. san fran during 9/11. Subject characteristics determine what levels of independent variable they are in. Add true ivs and this design seems more experimental. What makes an experiment an experiment: if you"re actually manipulating the independent variable, which would allow you to make a causal claim. Give people dv, then iv, then dv again, then compare pre- and post- on dv.

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