Research studies refer to systematic investigations conducted by scientists to gather information and gain knowledge about a specific topic or phenomenon. They involve following a structured methodology, collecting data, analyzing it, and drawing conclusions.
Experimental design refers to the plan or blueprint of how a research study will be conducted, including the selection of participants, manipulation of variables, and control conditions.
Sampling: Sampling involves selecting a subset of individuals from a larger population to participate in a research study. It helps researchers make inferences about the population based on the sample data collected.