What is the main purpose of random sampling in experimental research?

The main purpose of random sampling in experimental research is to ensure that the sample represents the population. This method involves selecting individuals from a larger population in such a way that every member has an equal chance of being chosen. This randomness helps to eliminate bias in the selection process, which can skew results and lead to inaccurate conclusions.

When a sample accurately reflects the characteristics of the population, researchers can generalize findings from the sample to the broader group. This representativeness is crucial in experimental research, where the goal is to draw valid conclusions that can be applied beyond the individuals studied.

While increasing sample size, reducing complexity, or making a sample more diverse may have benefits, they do not capture the primary objective of random sampling, which is to ensure that the sample mirrors the population being investigated.