Reliability

Question 1

How do you achieve reliability

Answer 1

1. Test, re-test
2. Same measures (tools to measure)
3. Same conditions

Question 2

With repeated testing, do you get:

Answer 2

Habituation, learning, fatigue, order effects

Question 3

State what it is meant by the key term ‘relative reliability’

Answer 3

Relative reliability - do the individual’s maintain their position within the group

Question 4

State what it is meant by the key term ‘absolute reliability’

Answer 4

Absolute reliability - do the dependent variables get the same results each time

Question 5

State what it is meant by the key term ‘Intra Rater’

Answer 5

Intra rater - is a judge giving the same decision for the same actions, if not, it lacks Intra Rater reliability

Question 6

State what it is meant by the key term ‘Inter Rater’

Answer 6

Inter Rater - if there are multiple judges and they don’t agree, then there is a lack of Inter Rater reliability

Question 7

State what it is meant by the key term ‘Objectivity/Rater reliability’

Answer 7

Objectivity/Rater reliability - does the collection of data always come to the same result

Question 8

State 3 facts about a ‘Bland-Altman plot’

Answer 8

1. Are data points above zero - systematic error
2. Is data spread evenly across mean line - random error
3. Scores get worse as the results get higher

Question 9

State what a Bland-Altman plot shows (3 points)

Answer 9

1. Useful display of the relationship between two paired variables using the same scale
2. Can perceive a phenomenon, but doesn’t test it
3. Does not give you a probability of error on a decision about the variables as would a test