reliability

Question 1

define reliability

Answer 1

Whether something is consistent and replicable

Question 2

what is internal reliability and how can it be tested?

Answer 2

• assesses the consistency of results across items within a test.

This can be assessed using:
- Split half method- measures the extent to which all parts of the test contribute equally to what is being measured

Question 3

what is external reliability?

Answer 3

External reliability refers to the extent to which a measure varies from one use to another

Question 4

how can external reliability be assessed?

Answer 4

1. Inter-rater reliability- extent to which two or more observers are observing and recording behaviour in the same way.
   - comparing the results of two researchers on the same thing and see how well they correlate.
   - improve inter rater reliability with training, practice in a pilot study, better operationalisation, and ensuring that each researcher has the same ability to see the subjects.
2. Test-retest reliability- presenting the same participants with the same test or questionnaire on two separate occasions
   - seeing whether there is a positive correlation between the two.
   - If correlation is poor then we should alter the task until it produces higher correlation.