Features guidance on evaluating books, journals, and web sites. Also has brief discussions of peer review, and how scholarly and popular, as well as primary and secondary, sources differ.
The scientific method
Scientific method: a method of procedure that has characterized natural science since the 17th century, consisting in systematic observation, measurement, and experiment, and the formulation, testing, and modification of hypotheses. --From the Mac OS Dictionary, Version 2.1.3.
Sample words found in publications likely indicating a scientific/scholarly approach informed an author's work:
Evidence | Data | Empirical | Experiment | Survey | Interview | Ethnographic | Study | Observation