Fundamental research statistics for the behavioral sciences (2nd ed.). Educational Measurement: Issues and Practice, 35(4), 25–30. Components of variance of scales with a bi-factor structure from two calculations of coefficient alpha. National Council on Measurement Education, 10(1), 37–45.Īndrich, D. Educational Measurement: Issues and Practices. Causing and being caused: Items in a questionnaire may play a different role, depending on the complexity of the variable. A measure is considered reliable if it would give us the same result over and over. Meaning and values in test validation: The science and ethics of assessment. In research, the term reliability means repeatability or consistency. Measurement and evaluation in education and psychology (4th ed.). The theory of the estimation of test reliability. Journal of Educational Measurement, 48(1), 12–30. A basis for analyzing test-retest reliability. National Council on Measurement in Education, 7(1), 25–35.

Reliability of scores from teacher-made tests. Coefficient alpha and the internal structure of tests. A structure of index and causal variables. The measure of all things: The seven-year odyssey and hidden error that transformed the world. Evaluation of methods used for estimating content validity. Encyclopedia of Autism Spectrum Disorders. Encyclopedia of Quality of Life and Well-Being Research. However, to provide meaningful research results, that data must be good. This process creates the data that we analyze. Measuring a person or item involves assigning scores to represent an attribute. Encyclopedia of Quality of Life and Well-Being Research. Reliability and validity are criteria by which researchers assess measurement quality. Psychological Testing in the Service of Disability Determination. doi:10.1037/a0026975Ĭommittee on Psychological Testing, Including Validity Testing, for Social Security Administration Disability Determinations Board on the Health of Select Populations Institute of Medicine. Defining and distinguishing validity: Interpretations of score meaning and justifications of test use.

Standards for talking and thinking about validity.

Define reliability and validity