Ktea-2 Assessment Critique

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Register to read the introduction… The retest interval ranged from 11 to 60 days and averaged 3½ to 4 weeks. Alternate-form reliability was also examined in this analysis because about half the students took Form A first and Form B second; the other half took the test in the opposite order. The reliability correlations for the three grade ranges for the Comprehensive Achievement composite were (.92), (.94), and (.95), respectively. For Pre-K to Grade 1, only the overall Reading and Decoding composites are sufficiently reliable. Coefficients for the Mathematics (.87), Written Language (.85), Oral Language (.64), Sound-Symbol (.84) and Oral Fluency (.59) composites are all below (.90). Letter & Word Recognition is the only subtest for Pre-K to Grade 1 with adequate reliability (.97). Coefficients for the rest of the subtests range from (.47) to (.88). For Grades 2 through 6 the Mathematics, Written Language, Reading Fluency, and Decoding Composites all had coefficients of at least (.90). The Reading (.87), Oral Language (.68), Sound-Symbol (.80), and Oral Fluency (.67) composites are less than .90. All subtest correlations are less than (.90), except Spelling, Nonsense Word Decoding, and Decoding Fluency. Coefficients for the Reading (.89), Oral Language (.81), and Oral Fluency (.76) composites are …show more content…
Children identified as high performing or talented received mean scores above average for all subtests and composites.

In terms of validity, comprehensive evidence is provided in support of the test’s content validity.
The addition of an Oral Language section to the KTEA-II seems beneficial, but is an area of particular concern in terms of both reliability and validity. I believe the Oral Language results should be interpreted cautiously.

Outside reviewers caution that there is a danger of overestimating or underestimating a student’s performance due to steep item gradients on the KTEA-II. When tests have steep item gradients, a 1-point change in raw scores can result in a large change in standard scores when using the KTEA-II. In some cases, a 1-point change in a raw score results in a change of as much as 13 standard score points. Reviewers have also found that although the norms for the KTEA-II begin at 4 to 6, most subtests do not have adequate floors at this age. Instruments without adequate floors do not have enough easy items to discriminate between students with and without skill deficits. Several concerns exist in regard to the adequacy of some KTEA-II subtest floors;

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