How can combining qualitative and quantitative research methods confirm a theory?

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Combining Qualitative and Quantitative Research Methods to Confirm a Theory

Introduction to Mixed Methods Research

Mixed methods research, which integrates both qualitative and quantitative approaches, has gained traction in various fields due to its comprehensive nature. This approach is particularly valuable in complex studies, such as those in healthcare and social sciences, where a single method may not sufficiently capture the multifaceted nature of the phenomena under investigation .

Analytical Approaches in Mixed Methods Research

Parallel, Concurrent, and Sequential Analysis

Mixed methods research can employ different analytical approaches: parallel, concurrent, or sequential. Parallel analysis involves conducting qualitative and quantitative analyses independently and then comparing the results. Concurrent analysis integrates both methods simultaneously, while sequential analysis uses one method to inform the other. The choice of approach depends on the research objectives and the nature of the data.

Triangulation as a Methodological Metaphor

Triangulation is a key concept in mixed methods research, serving as a metaphor for integrating qualitative and quantitative findings. This approach helps in drawing inferences from convergent, complementary, or divergent results, thereby enhancing the validity and reliability of the research outcomes . By using triangulation, researchers can clarify theoretical propositions and better understand the links between theory and empirical findings, which can challenge existing assumptions and lead to the development of new theories.

Practical Strategies for Combining Methods

Priority-Sequence Model

The Priority-Sequence Model is a practical strategy for combining qualitative and quantitative methods. This model involves two key decisions: determining the priority of the methods and deciding on their sequence. The principal method can be either qualitative or quantitative, with the complementary method serving as a preliminary or follow-up tool. This yields four basic research designs: preliminary qualitative methods in a quantitative study, preliminary quantitative methods in a qualitative study, follow-up qualitative methods in a quantitative study, and follow-up quantitative methods in a qualitative study.

Sampling and Data Collection Techniques

Combining qualitative and quantitative techniques in sampling and data collection can enhance the scope and analytic power of a study. Examples include criterion sampling from instrument scores, random purposeful sampling, and stratified purposeful sampling. Data collection combinations might involve using instruments for fuller qualitative descriptions, validation, purposeful sampling guides, and elicitation devices in interviews.

Validity and Theory Confirmation

Theory Testing and Development

Mixed methods research can be used for both theory testing and development. Theory-testing approaches focus on external and construct validation through the corroboration of converging findings, while theory development approaches probe unexpected or inconclusive findings to extend the theory. Combining these approaches within coherent research programs can address a broader range of potential validity threats.

Complementarity and Cross-Validation

While some argue that qualitative and quantitative methods cannot be combined for cross-validation due to their different paradigms, they can be effectively combined for complementary purposes. This means using each method to address different aspects of the research question, thereby providing a more comprehensive understanding of the phenomenon under study.

Conclusion

Combining qualitative and quantitative research methods offers a robust framework for confirming theories. By employing various analytical approaches, practical strategies, and triangulation, researchers can enhance the validity and reliability of their findings. This integrated approach not only clarifies theoretical propositions but also challenges existing assumptions and fosters the development of new theories. As mixed methods research continues to evolve, it promises to provide deeper insights and more nuanced understandings of complex phenomena.