PSYCHOLOGY 271: 9/17 - PSYCHOLOGY 271 9/17 REVIEW An experiment is when we test a hypothesis ↳ the purpose is to determine cause and effect

PSYCHOLOGY 271: 9/17 - PSYCHOLOGY 271 9/17 REVIEW An...

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PSYCHOLOGY 271: 9/17 REVIEW: - An experiment is when we test a hypothesis the purpose is to determine cause and effect relationship - A research can be “completed”. It is an approach to answer questions or seek “truth” includes experiments, correlational studies, observational approaches, longitudinal studies, archival studies. It is empirical: based on evidence. no bias and no error Correlational Studies vs Experimental Study Correlational - Is there a relationship between two or more variables? Experimental - There is usually an independent variable that is typically controlled. e.g. IV: one group gets alcohol and another gets fake alcohol DV: measure memory Does the operational definition of a variable actually reflect the true theoretical meaning of the variable? - Operational Definition: the set of procedures used to measure or manipulate the construct. e.g. pain scale Measuring the DV Multiple Measures: - If the IV has the same effect on several measures of the DV, there will be
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