pilot studies

• what is a pilot study

  a small scale trial run of a study to test any aspects of the design with a view to improve the study
• for example to find out

  if they understand the instruction

  if there are too many tasks and they will get bored

  if the tasks are easy/hard enough

  at a lower scale so lower price
• what is a confederate

  someone in an experiment who has been briefed to act in a certain way