(22) Reliability – How exact is the test?

//(22) Reliability – How exact is the test?

Reliability is one of the most important quality aspects of measurement instruments. It can be fatal if measurement instruments are not reliable. But how can you determine the reliability of a psychological test or questionnaire?

To estimate reliability several methods can be used, which have pros and cons:
a) test-retest reliability method
b) parallel-forms method
c) split-half method
d) Internal consistency

reliability – test-retest – parrallel-forms – internal consistency – split-half – test – questionnnaire – measurement – diagnostics – research methods – validity

Author: Eskil Burck (Degreed Psychologist)