The degree to which the test of a particular research hypothesis promises to make a valuable addition to existing knowledge about the behavior in question.

The overall quality of the measurement operations used to transform the constructs in a research hypothesis into the variables in a research study.

The extent to which a causal inference can be drawn with confidence from the research.

The extent to which research results can be generalized beyond the specific sample and context of the study.

The degree to which the statistical analysis of the research results contributes to an accurate understanding of the truth of the hypothesis.