Internal Validity Is Concerned With

Internal validity is concerned with:

A) the extent to which the change in the independent variable was actually due to the dependent variable.
B) the extent that the observed relationship between the independent variable and dependent variable can be generalized to the real world.
C) the measurement of extraneous variables that are internal to the experimental setting itself.
D) the extent to which the change in the dependent variable was actually due to the independent variable.
E) the control of the complex variables not having an effect on the independent variable.