When evaluating research studies, include information about the methods used to collect and analyze the data.
Qualitative Methods
According to the International Encyclopedia of the Social Sciences, qualitative methods yield:
data that is not easily obtainable with the use of quantitative methods. Qualitative methods encompass a variety of methodologies, including observation, interviewing, document analysis
Quantitative Methods
According to the International Encyclopedia of the Social Sciences, quantitative research
uses numbers as the basis for making inferences about the phenomenon under study. The hallmarks of quantitative research are control over extraneous influences (often involving experimental manipulation) and, more generally, statistical approaches to sampling, measurement, and data analysis