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Test of Written Spelling–Fifth Edition

Stephen C. Larsen, Donald Hammill, and Louisa Moats
    Normative Data

    The TWS-5 was normed on a representative sample of 1,634 students from 23 U.S. states. The analyses show no gender or racial bias in the TWS-5 items. Test reliability was studied in various ways: coefficient alphas, alternate form (immediate administration), test-retest, alternate form (delayed administration), and interscorer. All coefficients are over .90, which indicates the test's high reliability. Additional studies confirmed the TWS-5’s content-description, criterion-prediction, and construct-identification validity. Especially encouraging are the new studies of the test’s sensitivity, specificity, and ROC/AUC.


    Stephen C. Larsen, Donald Hammill, and Louisa Moats

    Age Range 5 to 18 years

    Administration Time 20 minutes

    Administration Type Group or individual

    Qualification Level B

    Format Handscored