PSY222 Chapter Notes -Internal Validity, Demand Characteristics, Developmental Psychology
Document Summary
Correlational studies can provide interesting new information in their own right. Researchers have developed some techniques that enable them to test for the cause. The best of these is experimentation: instead of measuring both variables, researchers manipulate one variable and measure the other without setting up an experiment. Researchers can use advanced correlational techniques to get closer to making a causal claim. Longitudinal designs, allow researchers to establish temporal precedence in their data. Multiple-regression analyses, which help researchers rule out certain third-variable explanations. Pattern and parsimony approach, in which the results of a variety of correlational studies all support a single, causal theory. Three criteria for establishing causation are covariance, temporal precedence, Three casual criteria and internal validity. A longitudinal design can provide evidence for temporal precedence by measuring the same variables in the same people at several points in time.
