PSYC 2360 Chapter Notes -Statistical Conclusion Validity, Blind Experiment, Internal Validity

• School: University of Guelph
• Department: Psychology
• Course: PSYC 2360
• Professor: Naseem Al- Aidroos

Document Summary

Occurs when extent that the experimenter is able to eliminate the effects on the dependent variable other than the effects of the independent variable: rare to have something that is single-y caused in psychology. Greater the experimental control, the more confidently we can say that it is the independent variable rather than something else, that causes the dependent variable. Extraneous variables - has effect on dependent variable only and makes it seem that the independent variable is causing the dependent variable: can still have internal validity, constitutes random error. Confounding variables - effects both the independent and the dependent variables: problem of a third variable, can no longer conclude in valid fashion that independent variable causes the dependent variable. Independent variable causes dependent variable what you can conclude if your experiment is internally valid. Internal validity is ensured only when there are no confounds.