Pilotstudies are small-scale trials that are run to test some or all aspects of the proposed investigation
They are conducted before the research to identify any issues which could arise and cause problems further down the line e.g.
Flaws in the design of the procedure
Ethical issues
Feasibility issues
Reliablity and Validity
If problems are exposed by the pilot study the researcher then as the opportunity to fix them or to find suitable alternatives
There are also financial reasons for a pilot study. The findings of a pilot study can be used as evidence to obtain funding for the research
Pilot studies can assess whether it is worth the time, money and efforrt to run the proposed investigation i.e. is it likely to find significant results