Theoretical framework is defined as the set of existing theories, concepts and relevant definitions that are used in a specific field of study. In research, theoretical framework is the evidence used to support the researcher's theory regarding a particular matter. Researchers use this set of information to build a case for why their interpretation of things is the correct one.
In a research paper, the thesis is an idea that the researcher is trying to prove using the theoretical framework. To build the framework, researchers must comb through studies, theories and data to create a valid argument. The chosen theoretical framework helps the writer convey the context that the topic will be examined in.