PSYC 2030 Study Guide - Final Guide: Observational Error, Factorial Experiment, Summary Statistics
6 Dec 2012
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Done by random assignment (also called randomization, each person in a population of subjects has an equal probability of being chosen at every draw, randomized experiments considered gold standard in biomedical research, three reasons for using random assignment. Provides a mechanism to derive probabilistic properties (p values) of estimates based on the data by controlling for extraneous variables. How is random assignment accomplished: first subject gets one treatment, second subject automatically gets other. Idea of drawing names, whether literally or computer based. Factorial designs and latin square designs: conditions as arranged along a continuum or single dimension, it is described as a one-factor or one-way design. On what grounds do scientists infer causality: hume"s three circumstance of contiguity, priority, and constant conjunction, covariation a fusion of what hume called contiguity and constant conjunction. It is possible to rule out plausible rival causal explanations.
