Define reliability.
How consistent findings from an experiment or measuring device are.
Define Test-retest reliability.
Method of assessing reliability of a questionnaire/psych test by assessing the same person on 2 separate occasions. This shows the extent to which a test is reliable.
Define inter-observer reliability.
Extent to which there’s an agreement between 2 or more observers in observation of behaviour.
How is inter-observer reliability measured?
By correlating the observations of 2 or more observers. If data has >+.8 reliability, it has high inter observer reliability