PSYC 2360 Lecture Notes - Lecture 12: Statistical Conclusion Validity, Internal Validity, Observational Error
19 Jan 2017
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Document Summary
Chapter 12 experimental control and internal validity. Good research is valid research: the conclusions drawn by the researcher are legitimate, the many threats to the validity of research may sometimes lead to unwarranted conclusions. Threats to the validity of research: threats to construct validity. Does the manipulation of the iv appropriately create the conceptual variable of interest: threats to statistical conclusion validity. Type 1 and type 2 errors: threats to internal validity (chapter 12) Can we trust the conclusions about the causal relationship between the iv and the dv: threats to external validity (chapter 13) Internal validity - extent to which changes in the dependent variable can confidently be attributed to the effect of the independent variable, rather than to the potential effects of confounding variables. Differences in how the experimenter treats the participants. How they react to the experimental setting: confounding variables - variables other than the independent variable on which the participants in one experimental condition differ systematically.
