PSYC 2030 Chapter Notes - Chapter 8: Summary Statistics, Repeated Measures Design, Causal Inference
28 Nov 2012
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How is causal reasoning attempted in the absence of randomization. Prospective data is collecting data by following one"s reaction forward in time. Commonly used in longitudinal research, the defining characteristic of such research being that individuals are observed and measured repeatedly through time. Retrospective data is data collected back in time. Campbell and stanley coined the expression quasi-experimental research to describe all the different types on nonrandomized research for generalized causal inference. Third-variable problem is correlated with both x and y is the reason x and. A third variable that is correlated with both x and y can also account for the correlation between x and y. Nonequivalent-groups design are traditionally between-subjects designs in which the sampling units (subjects, groups, etc. ) are allocated to experimental and control groups by means other than randomization and are observed or tested before and after the experimental treatment.
