1 Erratum to: Psychometrika Vol. 85, No. 1, 232–246, March 2020 https://doi.org/10.1007/s11336-020-09698-2

The original version of this article unfortunately contained a typographical mistake in one of the main formula. In Section 3, “A New Effect Size Index”, subscript “1” is missing in Eq. 8. The correct Eq. 8 is given below:

$$\begin{aligned} \hat{S}_{\beta }(\theta )=\left\{ \hbox {max}\left[ 0, (T_{m_1}(\hat{\theta })^2-m_1)/(n-m)\right] \right\} ^{1/2} \end{aligned}$$
(8)