TY - JOUR
AU - 김성훈
DA - 2012/01
PY - 2012
UR - http://search.proquest.com/docview/912432852?accountid=11283
UR - https://link.springer.com/article/10.1007%2Fs11336-011-9238-0
AB - Assuming item parameters on a test are known constants, the reliability coefficient for item response theory (IRT) ability estimates is defined for a population of examinees in two different ways: as (a) the product-moment correlation between ability estimates on two parallel forms of a test and (b) the squared correlation between the true abilities and estimates. Due to the bias of IRT ability estimates, the parallel-forms reliability coefficient is not generally equal to the squared-correlation reliability coefficient. It is shown algebraically that the parallel-forms reliability coefficient is expected to be greater than the squared-correlation reliability coefficient, but the difference would be negligible in a practical sense.
PB - SPRINGER, 233 SPRING ST, NEW YORK, NY 10013 USA
KW - reliability coefficient
KW - ability estimates
KW - item response theory
TI - A Note on the Reliability Coefficients for Item Response Model-Based Ability Estimates
VL - 77
DO - 10.1007/s11336-011-9238-0
T2 - PSYCHOMETRIKA
ER -