are all questions clearly communicated and relevant to the construct being measured? Inter-rater Reliability Method – Determines how consistently each item on a test measures the true construct being measured – e.g. Administer an alternate but equally difficult version of the test to the same group of individuals.Ĥ.Administer one version of a test to a group of individuals.students getting access to questions ahead of time or students getting better scores by simply practicing more. Parallel Forms Reliability Method – Determines how much error in the test results is due to outside effects – e.g. Generally a test-retest reliability correlation of at least 0.80 or higher indicates good reliability.ģ. Calculate the correlation between the scores of the two tests.Wait some amount of time (days, weeks, or months) and administer the same test to the same group of individuals.Administer a test to a group of individuals.loud environment, poor lighting, insufficient time to complete test. Test-Retest Reliability Method – Determines how much error in the test results is due to administration problems – e.g. Ideally you would like the correlation between the halves to be high because this indicates that all parts of the test are contributing equally to what is being measured.Ģ. The higher the correlation between the two halves, the higher the internal consistency of the test or survey. Calculate the correlation between the scores for both halves.Repeat for a large group of individuals.Administer each half to the same individual.
For example, one half may be composed of even-numbered questions while the other half is composed of odd-numbered questions. poorly worded questions or confusing instructions. Split-Half Reliability Method – Determines how much error in the test results is due to poor test construction -e.g. It turns out that there are four ways to measure reliability:ġ. Ideally, researchers want a test to have high reliability because that means it provides consistent measurements over time which means the results of the test can be trusted. in individuals multiple times, are the measurements consistent? If we measure something like intelligence, knowledge, productivity, efficiency, etc.
In statistics, the term reliability refers to the consistency of a measure.
0 kommentar(er)
