2. Reliability

Question 1

what is reliability?

Answer 1

Extent to which results consistent and therefore if can repeat study to get same results

Question 2

what is inter-rater reliability?

Answer 2

When 2+ psychologists conduct study separately and compare results to check for agreement/ similarity (strong positive correlation 0.8+)

Question 3

How can inter-rater reliability be improved?

Answer 3

1. Better training: more easily identify behaviour
2. Operationalisation: make sure both observers clear on what looking for + distinct behavioural categories
3. Behaviour view: both observers have same view on behaviour / video and both watch

Question 4

What is test-retest reliability and how is it compared

Answer 4

• Extent that tool consistent/ stable over time
• Test given to person on two separate occasions: if results similar then reliable (strong positive correlation

Question 5

How can test-retest reliability be improved?

Answer 5

• Do pilot study by looking closely at test and identifying parts that do not correlate well
• Remove / change parts to raise reliability