What is random sampling in experimental research?

Random sampling in experimental research is a method used to select participants in such a way that each member of the population has an equal chance of being chosen. This technique is critical for ensuring that the sample is representative of the larger population, which enhances the validity of the research findings. By employing random sampling, researchers minimize sampling bias and create conditions that support generalization from the sample to the broader population.

This approach is vital in experimental studies because it helps to ensure that any observed effects can be attributed to the intervention being tested rather than to pre-existing differences among the participants. When every individual has an equal opportunity to be selected, the resulting data becomes more reliable, making it easier to draw meaningful conclusions and strengthens the overall credibility of the research.