Not every research study needs a theoretical framework (TF) and a conceptual framework (CF), but it is recommended that you use them to help guide your research. A theoretical framework is a set of concepts and ideas that are used to explain and analyze a phenomenon, while a conceptual framework is a visual or written representation of the main concepts and variables in your study.

Using both frameworks can help you identify the gaps in the existing literature and design your research questions, hypotheses, and data collection methods. In addition, the frameworks can help you interpret your results and make recommendations for future research.

Choosing the appropriate methodology for your dissertation depends on the research questions, objectives, and data you plan to collect. Generally, the methodology section of a dissertation should describe the research design, data collection, and data analysis techniques.

If you are conducting a mix-method research study, you will need to describe how you plan to integrate both qualitative and quantitative data to answer your research questions. It is important to carefully consider the strengths and weaknesses of each method and how they complement each other.

Consulting with your dissertation advisor or committee members can also be helpful in determining the appropriate methodology for your study.

It is not necessary that every research needs both a theoretical and a conceptual framework. However, having a clear understanding of the theories and concepts relevant to your research can help you develop a stronger research design and facilitate the interpretation of your results. In a mixed-methods research, you may need both a theoretical and a conceptual framework to guide your study design and analysis. Theoretical frameworks help you to identify the key concepts and theories that you will use to investigate your research problem, while a conceptual framework can help you to operationalize these concepts and identify the variables that you will measure.

The methodology you choose for your dissertation will depend on the research question you are trying to answer and the data you need to collect to answer it. You may need to use a specific research methodology that is appropriate for your research question, such as qualitative or quantitative methods, or a mixed-methods approach. It is important to consider the strengths and limitations of each approach and choose the most appropriate one for your research question. Your advisor or dissertation committee can help you determine the best methodology for your research. Additionally, it may be helpful to review the literature to see what approaches have been used to investigate similar research questions.