The standard of comparison for checking or verifying the results of an experiment is called a control.
A control is essential in experimental research because it provides a baseline that can be compared against the experimental results. This helps researchers determine whether the observed effects in the experiment are due to the variable being tested or if they are the result of other uncontrolled factors. For example, in a drug efficacy study, a control group might receive a placebo while another group receives the actual medication. By comparing outcomes between the two groups, scientists can validate their findings and ensure the reliability of their results.