In the next leg of our “three-legged” stool, we learn that the research methodology is much more than just a simple set of methods—it is the science of measurement and the process of obtaining and allocating the sample. Methodology also critically evaluates the overall validity and reliability of scientific research. We ask questions like how the researchers obtain their information and why they use a particular technique, tool, or protocol.
KeywordsPopulation Sample Simple random sampling Systematic sample Stratified sampling Cluster sampling Researcher-completed instruments Subject-completed instruments Construct validity Content validity Criterion validity Reliable instrument Inter-rater reliability Intra-rater reliability Generalizability (G) theory Data Quantitative data Qualitative data Variable Continuous variable Discrete variable Interval measures Ratio measures Categorical variable Nominal measure Dichotomous measure Ordinal measure
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