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In: Psychology

what type of test would you not want to use reliability?

what type of test would you not want to use reliability?

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Expert Solution

Reliability and validity are two concepts in research that are important for defining and measuring bias and distortion. Reliability refers to the extent to which assessments are consistent. If a person takes the same personality test several times and always receives the same results, the test is said to be reliable.

The most common method to test reliability is;

  1. Test-retest reliability – This is a measure of reliability obtained by administering the same test twice over a period of time to a group of individuals. The scores from Time 1 and Time 2 can then be correlated in order to evaluate the test for stability over time. For example, A test designed to assess student learning in psychology given to a group of students twice, the second time after a gap of a week of the first test. The obtained correlation coefficient would indicate the stability of the scores.
  2. Parallel forms reliability- This is a measure of reliability obtained by administering different versions of an assessment tool. Both versions must contain items that probe the same construct, skill, knowledge base, etc. to the same group of individuals. The scores from the two versions can then be correlated in order to evaluate the consistency of results across alternate versions. For example:  To evaluate the reliability of an intelligence assessment tool, a large set of items that all pertain to intelligence assessment tool is created and then randomly divided the questions into two sets, that would represent the parallel forms.

Hayet Jeridi answered 2 months ago
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