Psychology - Reliability and Validity

Inter-Rater Reliability

Consistency between different researchers working on the same study.

Reliability

Consistency. The extent to which the findings can be repeated.

Validity

Extent to which a measure measures what it is supposed to measure.

External Reliability

How consistently a method measure over time when repeated.

Internal Reliability

How consistently a method measures within itself.

Concurrent Validity

New measure test scores are correlated with those from an established test.

Test Re-test Method

Participants take the same test on different occasions. High correlation between test scores = high external reliability.

Internal Validity

Where a studies results were really due to the IV the researcher manipulated.

Ecological Validity

Whether a test measures behaviour that is representative of naturally occurring behaviour.

External Validity

Whether the results can be generalised if conducted in a different environment or with different pp's etc.

Face Validity

Assessing whether our measuring tools appears to be doing what it should.

Intra-Rater Reliability

The consistency of a researchers behaviour. A researcher should produce similar results.