A quantitative research study vs a qualitative
Quantitative research deals with variables that can me measured with numbers.
Qualitative is more subjective in the sense that variables may be the simple presence or absence of certain measurable aspects, or the subjective evaluation of the observer.
The methodology depends on the study, however quantitative studies often outline standardized methods of counting the presence and/or degree of presence of a variable: number of cells in a dish, light ...
A brief discussion on the general differences between qualitative and quantitative studies. Objectivity and subjectivity as it applies to methodology, interpretation and the strength of interpretation is briefly discussed.