Reliability

Question 1

explain inter-rater reliability?

Answer 1

• extent to which 2 or more observations of the same behaviour are consistent
• data collected by 2 observers is correlated to assess reliability

Question 2

explain test-retest reliability?

Answer 2

• giving the same test to the same person/people on different occasions
• if it is reliable the results such be the same/very similar =two scores will be correlated
• must be enough time gap so pp’s cannot remember their answers but not too long incase their opinions have changed

Question 3

explain questionaries for ‘improving reliability?

Answer 3

• reliability can be tested using test-retest method to produce a correlation of +0.8 or more
• if it gets low test0retest reliability some aspects may need to be rewritten

Question 4

explain interviews for ‘improving reliability?

Answer 4

• to ensure reliability the same interviewer should be used

- and trained well, so not to ask leading questions, which is avoided in structured interviews

Question 5

explain experiments for ‘improving reliability?

Answer 5

-lab experiments often reliable as researcher has control over extraneous variables = standardised= replicable

Question 6

explain observations for ‘improving reliability?

Answer 6

• reliability increased when behavioural categories are operationalised +self evident
• categories shouldn’t overlap
• if these aren’t considered then observers due to subjectivity will have different and inconsistent data