The following list of journal articles and books provide extended reading on topics covered in chapter 6 in the second edition. Please note that journal articles are free to access, whereas book extracts (denoted by methods.sagepub.com URLs) require your university to have a subscription to SAGE Research Methods.

Trainor, A. A., & Graue, E. (2014). Evaluating rigor in qualitative methodology and research dissemination. Remedial and Special Education, 35(5), 267-274.
This article, from the field of special education, examines what is meant by ‘rigor’ in educational research and suggest some ways as to how the quality of research can be strengthened.