Processes and Procedures for Estimating Score Reliability and Precision

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.

KEYWORDS:

• Internal consistency
• reliability
• test–retest reliability

Additional information

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.