reveal whether participants understand the instructions, total experimental setting seems plausible, any questions are confusing -cant be used in the full study since they already know the study
reveal whether participants understand the instructions, total experimental setting seems plausible, any questions are confusing -cant be used in the full study since they already know the study
researcher does a trial run with a small number of participants; will reveal whether participants understand the instructions, whether any confusing questions are being asked, etc.