What term refers to the representations of processes, situations, items, or models used to illustrate concepts in research?

The correct term for representations of processes, situations, items, or models used to illustrate concepts in research is "Examples." In research, examples serve as practical illustrations that help to clarify complex ideas or concepts, making them more accessible. They are often used to provide a concrete representation of abstract theories or principles, thus enhancing understanding and retention of information.

While theories provide a broader framework for understanding phenomena, they do not serve as specific representations. Illustrations, though related, are typically visual aids rather than the actual representations of concepts in a broader context. Hypotheses, on the other hand, are specific predictions or propositions that can be tested through research but do not function as representations of concepts themselves. Therefore, examples are the most fitting term in this context for conveying ideas and facilitating comprehension in research.