reliability

• define reliability?

  it is the extent to which results are consistent

  checks to see if study can be repeated & get same results
• are there types of reliability?

  no
• what is inter observer reliability?

  rater reliability

  extent to which scores are consistent between multiple observers
• 4 key features of inter observer reliability?

  1. same training & use same behaviour categories
  2. seperately observe
  3. similar results
  4. strong 0.8 + correlation
• using training to improve inter observer reliability?

  give observers better training so they can easily identify behaviour
• using operationalisation to improve inter observer?

  make sure both observers are clear on what they are looking for

  could be checked by using pilot study

  use categories of behaviour grid
• what is test retest reliability?

  extent to which a tool is consistent/stable over time

  getting same results from same test on different occasion
• 3 features of test retest reliability?

  1. same test on different occasions
  2. similar results
  3. strong 0.8 + correlation
• how to improve test retest reliability?

  • standardise instructions
  • standardise procedures
  • standardise materials
  • identify & eliminate potential evs
  • change study a bit so method can be improved