PSYC 201 Chapter Notes - Chapter 6: Construct Validity, Internal Validity, Observational Error
29 Jan 2017
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Psyc 201 - chapter 6: validity: validity: extent to which a research conclusion corresponds with reality (a) internal validity: extent to which the study proves that the independent variable causes the dependent variable. Must rule out alternative variables as potential causes of results. Must rule out other possible theoretical explanations of the results. Usually stems from a poor operational de nition. Auxiliary hypothesis: hypothesis other than the one being tested, that is assumed to be true. Manipulation check: aspects of an experiment design that aims to check that a variable changes in the way that was intended (c) external validity: extent to which the results can be generalize beyond the research parameters. Takes into account other situations, materials, & populations. Unplanned (random) events that coincide with changes in the iv (iii)maturation: a source of error in an experiment related to the amount of time between measurements. Naturally occurring process that coincides with changes in the iv.
