WIAT3 Tech Manual.pdf - CAMPBELA

Appendix F 481Table F.3WAIS–IV Critical Values and Base Rates: Differences Between Predicted and Actual Achievement Subtest andComposite Standard Scores Required for Statistical Significance and Differences Obtained by Various Percentagesof Students in the Validity Sample (continued)Ages 16:0–19:11WIAT–IIISubtestsWAIS–IVScoresCritical Value pBase Rate.05 .01 ≤1% ≤5% ≤10% ≤15%Oral Reading Rate a FSIQ 6.97 9.18 29 21 16 13GAI 7.05 9.28 31 22 17 14VCI 7.41 9.75 30 22 17 14PRI 6.97 9.17 33 24 19 15Spelling FSIQ 6.42 8.45 28 20 16 13GAI 6.54 8.60 29 21 16 13VCI 6.87 9.04 30 21 17 14PRI 6.52 8.59 32 23 18 15Math Fluency—Addition FSIQ 10.89 14.33 28 20 16 13GAI 10.91 14.37 31 22 17 14VCI 10.99 14.46 32 23 18 14PRI 11.04 14.53 31 22 17 14Math Fluency—Subtraction FSIQ 10.47 13.78 29 21 16 13GAI 10.51 13.84 31 22 17 14VCI 10.62 13.98 31 22 18 14PRI 10.57 13.91 32 23 18 15Math Fluency—Multiplication FSIQ 10.01 13.17 30 21 17 14GAI 10.00 13.17 32 23 18 14VCI 10.05 13.23 33 23 18 15PRI 10.12 13.32 32 23 18 15WIAT–IIICompositesWAIS–IVScoresCritical Value pBase Rate.05 .01 ≤1% ≤5% ≤10% ≤15%Oral Language FSIQ 9.87 13.00 21 15 12 10GAI 10.15 13.36 21 15 12 10VCI 10.71 14.10 21 15 12 10PRI 10.10 13.29 28 20 16 13Total Reading FSIQ 5.89 7.75 25 18 14 11GAI 6.10 8.03 27 19 15 12VCI 6.65 8.75 27 19 15 12PRI 6.06 7.98 31 22 17 14Basic Reading FSIQ 4.83 6.35 29 20 16 13GAI 5.01 6.60 30 21 17 13VCI 5.47 7.20 30 21 17 14PRI 4.99 6.57 32 23 18 15Reading Comprehension and Fluency FSIQ 9.26 12.19 26 19 15 12GAI 9.40 12.38 27 19 15 12VCI 9.80 12.90 27 19 15 12PRI 9.32 12.27 31 22 18 14Written Expression FSIQ 7.12 9.38 27 19 15 12GAI 7.25 9.54 28 20 16 13VCI 7.74 10.18 28 20 16 13PRI 7.18 9.45 32 23 18 14Mathematics FSIQ 5.87 7.72 25 18 14 12GAI 6.05 7.96 27 19 15 12VCI 6.10 8.03 31 22 17 14PRI 6.56 8.64 28 20 15 13Math Fluency FSIQ 7.03 9.26 28 20 16 13GAI 7.07 9.30 31 22 17 14VCI 7.21 9.49 32 23 18 14PRI 7.21 9.49 32 23 18 14Total Achievement FSIQ 5.38 7.08 20 15 12 9GAI 5.72 7.52 23 16 13 10VCI 6.40 8.42 24 17 13 11PRI 5.82 7.66 28 20 16 13Note. FSIQ = Full Scale IQ, GAI = General Ability Index, VCI = Verbal Comprehension Index, PRI = Perceptual Reasoning Index.a Supplemental scores.Copyright © 2009 NCS Pearson, Inc. Normative data copyright © 2009 NCS Pearson, Inc. All rights reserved.