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A Substruction Approach to Assessing the Theoretical Validity of Measures
Polly Ryan1, Marianne Weiss2, Paula Papanek3
1University of Wisconsin, Madison, School of Nursing, WI.
Background:
Validity is about the logic, meaningfulness, and evidence used to defend inferences made when interpreting results. Substruction is a heuristic or process that visually represent the hierarchical structure between theory and measures.
Purpose:
To describe substruction as a method for assessing the toretical validity of research measures.
Methods:
Using Fawcett's Conceptual-Theoretical-Empirical Structure. an exemplar is presented of substruction from the Individual and Family Self-Management Theory to the Striving to be strong study concepts and empirical measures.
Results:
Substruction tables display evidence supporting theoretical validity of the instruments used in the study.
Conclusion:
A high degree of congruence between theory and measure is critical to support the validity of the theory and to support attributions made about moderating, mediating, causal relationships, and intervention effects.
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