4.2.3.1 RELIABILITY

Question 1

what does reliability focus on?
when is a study reliable?

Answer 1

• on the consistency of a study
• if a study is completed in the same way and gets the same results, it can be said to be reliable

Question 2

what is internal reliability?

Answer 2

the extent something is consistent with itself

Question 3

what is external validity?

Answer 3

the extent a test measure is consistent over time

Question 4

there are three ways to assess reliability
what are these?

Answer 4

1) the test-retest method
2) the split-half method
3) inter-observer method

Question 5

what is the test-retest method?

Answer 5

• measures external reliability
• gives the same test to the same ppt’s twice (on different occasions)
• if the same result is gained then reliability is established

Question 6

what is the split-half method?

Answer 6

• measures internal validity
• splits the test in half and has the same ppt complete both halves
• if a similar result is provided from both halves, then it has internal reliability

Question 7

what is inter-observer reliability?

Answer 7

• designed to stop observer bias
• two or more observers complete independent observations on the same study
• if their results are similar then they’re reliable results