pilot studies

• what is a pilot study and its purpose

  a small scale run that takes place before real investigation to check that procedures materials all work and allow reproacher to make modifications if needed
• what is a single blind procedure and its purpose

  investigation whereby participants do not know aims of study

  this is to avoid demand characteristics
• what is a double bind procedure ands it purpose

  investigation whereby both participants and investigator dont know aim of study

  this is to reduce demand characteristics and investigator effect