Psychology 2800E Study Guide - Null Hypothesis, Statistical Inference, Mcburney School

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Validity- an indication of accuracy in terms of the extent to which a research conclusion corresponds with reality. Four types of validity- internal, construct, external and statistical conclusion. Internal validity is the most fundamental type because it concerns the logic of the relationship between the independent and dependent variables. In an experiment with high internal validity, it really was the independent variable that caused the dependent variable. Such variables are called subject variables (i. e. , gender) Subject variables- a difference between subjects that cannot be controlled but only selected. To improve construct validity you might use a manipulation check; an aspect of an experiment designed to make certain that variables have changed in a way that was intended. A good manipulation check is the beck anxiety inventory. External validity- how well the ndings of an experiment generalize to other situations or populations.