Internal Validity Refers To

Internal validity refers to:

A) Inferring causation from pre-experimental research designs.
B) The amount of confidence we have that changes in the dependent variable are the result of the independent variable and not some other factor.
C) Minimizing attrition in longitudinal or time series designs.
D) The degree to which study results can be generalized to other cases not studied as well as to the population in general.
E) Creating equivalent groups through random sampling.