Reliability and validity Flashcards
Reliability
The consistency of the test, measure or observer
What’s a reliable measure
One that produces the same results on different occasions
Inter-rater reliability
Running a correlation between the scores given by 2 or more judges
Test-retest reliability
Participants take part in the same test twice and the reliability is measured by correlating the scores on the tests
Equivalent forms reliability
Participants take 2 equivalent or similar forms of the same test and their scores are correlated
Split half reliability
Measure of internal consistency to see if each part of the test gives the same result as others so a single test is split into 2 or more parts and a correlation is run between them
Validity
Whether a test is measuring what it claims to be measuring
Face/content validity
Evaluating whether or not the test looks right and the content seems representative of the area being covered
Concurrent validity
Measured by comparing the results on a test to an independent measure of the same variable
Ecological validity
A measure of how test performance predicts behaviours in real world settings (external validity)
Temporal validity
The ability to generalise findings from a study to different time periods