Experiments are said to have ______ validity when observed changes in the dependent variable(s) can be causally related to the independent or treatment variable.
A) analogue
B) construct
C) internal
D) external

Question

Quizplus · Accepted Answer

Internal validity refers to the degree to which an experiment or study is free from errors and confounding variables, which leads to the conclusion that observed changes in the dependent variable(s) are due to the independent or treatment variable. Thus, internal validity is essential to establish causal relationships between variables in an experiment. Analog validity, construct validity, and external validity are all important, but they are not directly related to the establishment of causal relationships in a study.

Experiments Are Said to Have ______ Validity When Observed Changes