Chapter 1 Research Methods Internal Validity
Chapter 1 Research Methods
Internal Validity
Technical Quality of Research Certainty that it is the manipulation of the independent variable that is causing changes in the dependent variable
Biggest threat to internal validity is that an uncontrolled or even an unknown variable may be responsible for changes in the dependent variable
Threats to Internal Validity Described in text: Local history Maturation of subject Pretesting Instrumentation Statistical regression Differential selection of subjects Experimental mortality
Example Obesity and mortality example
Internal Validity
Technical Quality of Research Certainty that it is the manipulation of the independent variable that is causing changes in the dependent variable
Biggest threat to internal validity is that an uncontrolled or even an unknown variable may be responsible for changes in the dependent variable
Threats to Internal Validity Described in text: Local history Maturation of subject Pretesting Instrumentation Statistical regression Differential selection of subjects Experimental mortality
Example Obesity and mortality example
