WIAT II

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WIAT II
Wechsler Individual Achievement TestSecond
Edition By David Wechsler
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About the WIAT II

• Published by The Psychological Cooperation
• Updated in 2001
• Its purpose is to assess the individual
  achievement of a student.

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Overview of the WIAT-II

• Comprehensive
• Individually administered
• Grades Pre Kindergarten through 16
• Ages 40 to adulthood
• 9 Subtests in 4 content areas
• Time Pre-K - K 45 min
• Grades 1 6 90 min
• Grades 7 16 90 120 min

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WIAT-II and Written Language

• Written Language
• Spelling
• Written Expression

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• Interpretation
• This is a direct way of measuring an examinees
  written discourse.
• This goes beyond the indirect method of assessing
  writing ability by measuring vocabulary and
  editing skills. Written Expression addresses
  vocabulary, editing skills, and skills in
  formulating an idea and developing that idea into
  coherent discourse.

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Interpretation Continued.

• The Paragraph (given to Grades 3-6) can be
  evaluated analytically using a rubric scoring
  system based on organization, vocabulary, and
  writing mechanics (spelling and punctuation).
• The Essay (given to Grades 7-16) can be evaluated
  analytically using a rubric scoring system based
  on organization, vocabulary, theme development
  and writing mechanics.
• Both the the Paragraph and the Essay can be
  scored holistically, but analytic scoring is
  required for a subtest standard score.
• Word count is a Supplemental score.

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Reliability and Validity

• Reliability is Split-Half and .98.
• Its Internal Consistency is above .85.
• Validity is .80 for the total test.

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Results

• Raw Score and Standard Score.
• The Standard Error of Measurement is 2.8 5.8.

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In Conclusion

• In conclusion the WIAT II appears to be an
  effective tool for measuring individual
  achievement. We feel that the test is user
  friendly, provided the proper training has
  occurred. The test also seems to be unbiased and
  appropriate for the testee.