title: Convergent and diagnostic validity of STAVUX, a word and pseudoword spelling test for adults.
abstract: Few comprehensive spelling tests are available in Swedish, and none have been validated in adults with reading and writing disorders. The recently developed STAVUX test includes word and pseudoword spelling subtests with high internal consistency and adult norms stratified by education. This study evaluated the convergent and diagnostic validity of STAVUX in adults with dyslexia. Forty-six adults, 23 with dyslexia and 23 controls, took STAVUX together with a standard word-decoding test and a self-rated measure of spelling skills. STAVUX subtest scores showed moderate to strong correlations with word-decoding scores and predicted self-rated spelling skills. Word and pseudoword subtest scores both predicted dyslexia status. Receiver-operating characteristic (ROC) analysis showed excellent diagnostic discriminability. Sensitivity was 91% and specificity 96%. In conclusion, the results of this study support the convergent and diagnostic validity of STAVUX.
authors.affiliation: a Department of Clinical Sciences , Intervention and Technology (CLINTEC), Division of Speech-Language Pathology, Karolinska Institutet, and Department of Speech-Language Pathology, Karolinska University Hospital , Huddinge , Stockholm.
authors.forename: Per
authors.initials: P
authors.lastname: Östberg
authors.affiliation: b Uppsala University, Department of Neuroscience , Speech-Language Pathology , Uppsala , Sweden.
authors.forename: Charlotte
authors.initials: C
authors.lastname: Backlund
authors.affiliation: b Uppsala University, Department of Neuroscience , Speech-Language Pathology , Uppsala , Sweden.
authors.forename: Emma
authors.initials: E
authors.lastname: Lindström
mesh_terms: D000328:Adult; D019540:Area Under Curve; D016022:Case-Control Studies; D032882:Comprehension; D004410:Dyslexia / Q000175:diagnosis* / Q000523:psychology; D005260:Female; D006801:Humans; D007807:Language Tests; D008297:Male; D008875:Middle Aged; D011237:Predictive Value of Tests; D012372:ROC Curve; D011932:Reading; D015203:Reproducibility of Results; D014956:Writing; D055815:Young Adult
keywords: Assessment; dyslexia; reading; spelling; validity; writing