Technical and Statistical Characteristics of the BELT-3
The BELT-3 was normed on a sample of 684 from 29 states and 199 different zip codes. Its subtest raw scores can be converted to percentile ranks and scaled scores. The scaled scores for the two subtests are summed and converted to a composite called the Expressive Language Index. The Examiner’s Manual includes a comprehensive discussion of the test’s theoretical and research-based foundation, item development, standardization, administration and scoring procedures, norms tables, and guidelines for using and interpreting the test’s results.
The BELT-3's internal consistency reliability coefficients are .83 and .92 for the subtests and .93 for the composite. Test retest reliability coefficients are .91 and .88 for the subtests and .91 for the composite. Validity studies demonstrate the test’s ability to differentiate children with language impairments and those without. Specifically, an Expressive Language Index cutoff score of 90 resulted in a sensitivity of .71, a specificity of .73, and a receiver operating characteristic/area under the curve of .83 in differentiating children with language impairments from children without.
Complete BELT-3 test kit includes: Examiner’s Manual, Picture Book, and 25 Examiner Record Booklets, all in a sturdy storage box.
User Qualifications:
“All test users, regardless of level and profession, are expected to abide by the standards set forth by the APA, AERA and NCME regarding the ethical use, protection and dissemination of all test materials.
All orders for the products listed below cannot be completed online, they must be placed on official institutional purchase order forms or professional letterhead. For questions or help placing your order for these items call (800) 880-4433.
Item# | Products | Price | |
---|---|---|---|
YP2111YT | BELT-3 Complete Kit | $ 240.00 | |
YP2112YT | BELT-3 Examiner's Manual | $ 63.00 | |
YP2113YT | BELT-3 Picture Book | $ 120.00 | |
YP2114YT | BELT-3 Examiner's Record Booklets (25) | $ 59.00 |