Lecture 3 Psychology as Science.docx

Lecture 3 Psychology as Science.docx - Lecture 3...

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Lecture 3: Psychology as a Science Cont. Random Sampling vs. Random Assignment Random Sampling- how you get the pool of research participants that represents the pop you’re trying to learn about Random Assignment- of participants to control or experimental groups (first sample, then sort (assign)) Placebo Effect How do we make sure the experimental group doesn’t experience an effect bc they expect to experience it Control groups given a placebo so they don’t know if given the treatment or not Single blind- participants blind, Double-blind- neither participant nor research staff knows Experimental Variables Independent Variable (IV) - Factor that experiment is manipulating Dependent Variable (DV) - Factor that is measured, variable that might change when IV is manipulated Confounding Variable - Any other variables that might have an effect on the DV ADHD Study- not truly random sample bc kids are mostly from Atlanta/Emory area, convenience sample Correlation vs. Causation Are breastfed babies smarter?
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