Reliability: In psychological research, the term reliability is defined as the stability or constancy of a specific measuring test, experiment, or research study.
Example: If a researcher is conducting a particular research and gets a particular result ten if the same research is being conducted after a time interval then he or she would expect the same result and if gets the same result then the research would be considered as reliable and if not then it would be considered as not reliable.
In the question above, the given statement means that the experiment is not reliable.
