Fig. 2.
a Estimated reliability of TAS-8 latent trait scores across the full latent alexithymia continuum. The horizontal dashed line indicates rxx = 0.7, the a priori threshold for acceptable score reliability. Individual reliabilities for trait scores between − 2.43 and 3.53 are all greater than or equal to this cutoff, including all trait levels estimable by the TAS-8 (i.e., θ between − 2.19 and 3.52). b Item-level information functions for TAS-8 items. Vertical dashed lines indicate the trait levels captured by the minimum TAS-8 score (all “0” responses, θ = − 2.19) and the maximum TAS-8 score (all “5” responses, θ = 3.52). The sum of all item information functions equals the test information function