Estimating how many observations are needed to obtain a required level of reliability

Abstract

This article provides a detailed table containing estimations of how many observations are needed to obtain an increased reliability coefficient for situations such as observational data collection in the classroom. A SPSS program is provided for users to analyze situations where an initial reliability value is obtained and the user wants to determine how many more observations are needed to reach a required level of reliability. Copyright © 2008 JMASM, Inc.