Psych M.D.-Reliability


A B C D E F G H I J K L M N O P Q R S T U V W X Y Z


Term: Reliability
Definition (Myers): the extent to which a test yields consistent results, as assessed by the consistency of scores on two halves of the test, on alternate forms of the test, or on retesting. 1
Definition (alternative): Reliability refers to the consistency of a measure. A test is considered reliable if we get the same result repeatedly. 2
Contextual explanation: Comparing test scores to the standardizing group won't say much unless the test has reliability. It must have consistent scores. People retake the same test or another form of it. If the scores correlate, then the test is reliable. Another way is splitting the test in half and seeing whether the scores from odd and even questions agree. The higher correlation between the test-retest or the split-half scores, the higher the test's reliability. 1
Related terms and concepts:
3

A video explaining reliability--very easy to understand!
reliablility4
How reliability is tested
Related websites:
Sources:
  1. Myers, D.G. (2004). Psychology. Holland, Michigan: Worth Publishers.
  2. Wagner, Kendra Van About: Psychology. Retrieved October 22, 2009, from What Is Reliability? Web site: http://psychology.about.com/od/researchmethods/f/reliabilitydef.htm
  3. (2008, Feb. 4). Youtube. Retrieved October 22, 2009, from Reliability Web site: http://www.youtube.com/watch?v=fmqKQBMgB4M
  4. Wadsworth. Retrieved October 22, 2009, from Reliability and Validity Web site: http://www.wadsworth.com/psychology_d/special_features/ext/workshops/psychimages/reliability.gif



Edited by: Lydia
Date of last edit: 10/22/09



More pages