Lesson 19 - Reliability

Question 1

Reliability

Answer 1

The consistency of a research study or a measuring test

Internal and External reliability

Question 2

Internal Reliability

Answer 2

The extent so which a measure is consistent within itself

The split-half method assesses the internal reliability of a test
Measures extent to which all parts of the test contribute equally to what is being measured
Done by comparing results of one half of a test with results from other
If two halves provide similar results, it has internal reliability

Question 3

External Reliability

Answer 3

Extent to which a measure varies from one use to another

Test-retreat involves giving participants same test on two separate occasions
Similar results => external reliability

Inter-rather reliability researchers observe same behaviour independently
If similar, data has external reliability
0.8 correlation needed between test and re-test