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ABSTRACT
Precision is a key facet of test development, with score reliability determined primarily according to the types of error one wants to approximate and demonstrate. This article identifies and discusses several primary forms of reliability estimation: internal consistency (i.e., split-half, KR–20, α), test–retest, alternate forms, interscorer, and interrater reliability.
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Notes on contributors
Gerta Bardhoshi
Gerta Bardhoshi, PhD, is an assistant professor in the counselor education and supervision program of the Rehabilitation and Counselor Education Department at the University of Iowa.
Bradley T. Erford
Bradley T. Erford, PhD, is a professor in the Department of Human and Organizational Development in the Peabody College of Education at Vanderbilt University.
