A TQF Approach to Construct Validity

TQF approach to construct validity

Construct validity plays an important role in the design, implementation, analysis, and ultimate usefulness of qualitative research methods. The construct of validity itself in qualitative research is discussed in this article and cites qualitative researchers across disciplines who explore “unique dimensions” and other considerations  relating to validity in qualitative research.

The Total Quality Framework (TQF) relies heavily on construct validity in its quality approach to each phase of the qualitative research process. At each phase, the researcher must ask “Am I gaining real knowledge about the core concepts that are the focus of this research?” For example,

  • An important step when developing a research design is to identify the key constructs associated with the research objectives to investigate, and the particular attributes of each construct that the researcher wants to explore. So, for example, a researcher conducting a study on dietary behavior may have interest in “health consciousness,” including shopping behavior related to organic and fresh foods.
  • In the in-depth interview and focus group discussion methods, careful attention needs to be paid to guide development and the inclusion of questions relevant to the constructs of interest. When developing the guide, the researcher needs to ask “Is this [topic, question, technique] relevant to the construct we are investigating?”, and “Does this [topic, question, technique] provide us with knowledge about the aspect of the construct that we intended to explore in the interviews/discussions?”
  • In ethnography, the observation guide and observation grid are important tools. “The grid is similar to the guide in that it helps to remind the observer of the events and issues of most import; however, the observation grid is a spreadsheet or log of sorts that enables the observer to actually record and reflect on observable events in relationship to the research constructs of interest” (Roller & Lavrakas, 2015, p. 206).
  • The quality of qualitative data analysis hinges on the researcher’s ability to effectively identify, analyze, and develop valid interpretations of the data around the important constructs associated with the research objectives. To assist the researcher, a TQF approach to analysis recommends a codebook format and coding form (which is basically a reflexive journal for the coder[s] to record thoughts and justifications for their coding decisions) that highlights constructs of interest. For example,

TQF codebook and coding form

  • Construct validity also plays an important role in the transparency of the final research document. In the study report, the researcher can (and should) elaborate on the design, data gathering, and analysis decisions that were made pertaining to the key constructs, as well as the main themes that were derived from the data — i.e., the knowledge that was gained from the research — concerning these constructs.

Roller, M. R., & Lavrakas, P. J. (2015). Applied qualitative research design: A total quality framework approach. New York: Guilford Press.

 

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