Rigor in research refers to the strict adherence to a set of principles and standards aimed at ensuring the validity, reliability, and credibility of the research findings. This includes using rigorous methods, following ethical guidelines, accurately collecting and analyzing data, and critically evaluating the results. Rigor is essential in research to ensure that the findings are trustworthy and can be used to make informed decisions or draw reliable conclusions. Researchers must carefully consider and address potential biases, limitations, and threats to the study's validity to maintain rigor in their work.