Your course textbook can be accessed via the Redshelf link in the Getting Started module.
Research and Evaluation in Education and Psychology. Integrating Diversity with Quantitative, Qualitative and Mixed Methods
Mertens, D. M. (2019). Research and evaluation in education and psychology. Integrating diversity with quantitative, qualitative and mixed methods (5th ed.). Sage.
Review Chapter 11- pay particular attention to pages 336-345 and 366-378 which address participant ethics, including issues of diversity, underserved populations, and social justice related to sampling and data collection.