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Fig. 2 | Molecular Autism

Fig. 2

From: Improving the measurement of alexithymia in autistic adults: a psychometric investigation of the 20-item Toronto Alexithymia Scale and generation of a general alexithymia factor score using item response theory

Fig. 2

A Estimated reliability of GAFS-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 GAFS-8 (i.e., θ between − 2.19 and 3.52). B Item-level information functions for GAFS-8 items. Vertical dashed lines indicate the trait levels captured by the minimum GAFS-8 score (all “0” responses, θ =  − 2.19) and the maximum GAFS-8 score (all “5” responses, θ = 3.52). The sum of all item information functions equals the test information function

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Molecular Autism

ISSN: 2040-2392