Experimental research is a methodological approach used in scientific studies to investigate cause-and-effect relationships between variables. In this type of research, researchers manipulate one or more variables (independent variables) and measure the effect on another variable (dependent variable) to determine the impact of the manipulation. Experimental research often involves the use of control groups, random assignment of participants, and rigorous data collection methods to ensure the validity and reliability of the findings. This type of research is commonly used in psychology, medicine, and various other fields to test hypotheses and draw conclusions based on empirical evidence.