Reviewing the literature
British Medical Journal: Assessing quality in qualitative research
This article outlines two opposing views of how qualitative methods might be judged and argues that qualitative research can be assessed according to two broad criteria: validity and relvance.
British Medical Journal: How to read a paper: papers that summarise other papers (systematic reviews and meta-analysis)
This article discusses the methodology for systematic reviews.
Critically reviewing the literature
Academic Services Millbrook House - provides useful links at the end of the document to checklists for study designs.
Research Forum: How to critically read a journal research article
This article presents concepts involved in reader evaluation of research literature.