Research can generally be described as being either qualitative or quantitative; journal articles describing the research will match the topic of the article.
Qualitative research is generally marked by use of questionnaires, surveys, and other tools designed to gain verbal information and reactions or understandings about the topic(s) being researched. Quantitative research relies on the collection and analysis of numerical data - hence the reference to quantity.
Some researchers consider qualitative research as being suspect because it does not produce objectively measurable results.
Quantitative research on amassing irrefutable data and presenting it in a concise, visually appealing manner via charts and grafs. Qualititave is just more like a bunch of people sitting around, dialoguing and they write up their opinions and try to pass them off as fact. Youu see a chart and stastical tables...you're looking at quantitative.
Hope this helps,
In order to know whether a research is quantitative or qualitative, you would first need to understand what quantitative and qualitative is.
Quantitative journal article has the use of number and statistic to disscus the research done about the article. The information collected comes in the form of figures. With qualitative, the information research for the journal article is made up of information taken from an interview, survey or questionnaire. This research has statements about what was researched.