What are the different types of quantitative research design, and how do researchers choose the right method for a study? In this video, explore common quantitative research design methods and how they can be used to answer research questions with numerical data. Learn how descriptive research identifies patterns and associations without establishing cause and effect, and how correlational researchexamines relationships between variables. Explore how longitudinal studies track change over time and how survey research collects numerical data using questionnaires, polls and structured interviews. You’ll also learn about quasi-experimental and experimental research designs, including independent and dependent variables, interventions and random assignment. Finally, discover how causal-comparative research examines possible causes or consequences of changes that have already occurred. Choosing a quantitative research design also means considering your research aims, data collection meth...