Disclosure statement
No potential conflict of interest was reported by the author.
Notes
1. Other estimated parameter values are a (recognition validity) = .78, b (knowledge validity) = .58, and g (guessing validity) = .52. The fit is improved if g is not allowed to vary and set at a constant .5 (G2 = 1.43, df = 2, p = .49), but the other parameter values do not change, and this version of the model is not significantly different from the original (G2 = 0.28, df = 1, p = .60).