What is the term used when researchers restrict their participant recruitment due to financial constraints?

The term that accurately describes the process of researchers restricting their participant recruitment due to financial constraints is delimitations. Delimitations refer to the boundaries set by researchers regarding the scope of their study, which can include limitations on participant selection based on available resources, such as funding. By defining these parameters, researchers clarify the aspects of the study that are within their control and establish the framework within which their research operates.

This is essential in research planning as it allows for a clear understanding of the population being studied and acknowledges the constraints that can influence the study's results and applicability. Delimitations help maintain focus on specific outcomes or populations that the researchers are able to examine due to their budgetary limitations.