Relationship Between Reliability and Cost of Performance Assessment

Main Article Content


Performance assessments have come upon two major roadblocks: low reliability coefficients and high cost. Recent speculation has posited that the two are directly related such that cost must rise in order to increase reliability. This understanding may be an oversimplification of the relationship. Two empirical demonstrations are offered to show that more than one combination of sources of error may result in a desired generalizability coefficient and that it is possible to increase the number of observations while also decreasing cost.


Download data is not yet available.

Article Details

How to Cite
Parkes, J. (2000). Relationship Between Reliability and Cost of Performance Assessment. Education Policy Analysis Archives, 8, 16.
Author Biography

Jay Parkes, The University of New Mexico

Jay Parkes is an Assistant Professor of Educational Psychology at the University of New Mexico. He received his Ph.D. in Educational Psychology from the Pennsylvania State University in 1998 specializing in applied measurement and statistics. His research interests include generalizability in performance assessment and cognitive and motivational aspects of performance assessments.