WIAT3 Tech Manual.pdf - CAMPBELA

488 Appendix GTable G.2WISC–IV Critical Values and Base Rates: Differences Between Ability and Achievement Subtest and CompositeStandard Scores Required for Statistical Significance and Differences Obtained by Various Percentages ofStudents in the Validity SampleAges 6:0–16:11WIAT–IIISubtestsWISC–IVScoresCritical Value pBase Rate.05 .01 ≤1% ≤5% ≤10% ≤15%Listening Comprehension FSIQ 13.15 17.31 32 23 18 14VCI 14.10 18.56 34 24 19 15PRI 14.70 19.35 36 26 20 17Early Reading Skills FSIQ 11.39 14.99 27 19 15 12VCI 12.47 16.42 39 28 22 18PRI 13.15 17.31 35 25 19 16Reading Comprehension FSIQ 12.12 15.96 29 21 16 13VCI 13.15 17.31 29 21 16 13PRI 13.79 18.15 37 26 20 17Math Problem Solving FSIQ 10.18 13.41 29 21 16 13VCI 11.39 14.99 37 26 20 17PRI 12.12 15.96 33 24 19 15Alphabet Writing Fluency FSIQ 17.14 22.57 46 33 26 21VCI 17.88 23.54 52 37 29 23PRI 18.36 24.17 48 34 26 21Sentence Composition FSIQ 11.76 15.48 30 21 17 14VCI 12.82 16.87 37 26 21 17PRI 13.47 17.73 36 26 20 16Word Reading FSIQ 7.20 9.48 28 20 16 13VCI 8.82 11.61 34 24 19 15PRI 9.75 12.84 38 27 21 17Essay Composition FSIQ 11.39 14.99 38 27 21 17VCI 12.47 16.42 42 30 23 19PRI 13.15 17.31 45 32 25 20Essay Composition: GrammarFSIQ 13.15 17.31 34 24 19 15and Mechanics a VCI 14.10 18.56 40 28 22 18PRI 14.70 19.35 41 29 23 18Pseudoword Decoding FSIQ 7.20 9.48 34 24 19 16VCI 8.82 11.61 38 27 21 17PRI 9.75 12.84 42 30 23 19Numerical Operations FSIQ 9.30 12.24 32 23 18 14VCI 10.60 13.95 39 28 22 18PRI 11.39 14.99 37 26 20 17Oral Expression FSIQ 11.76 15.48 26 18 14 12VCI 12.82 16.87 27 19 15 12PRI 13.47 17.73 33 23 18 15Oral Reading Fluency FSIQ 9.30 12.24 34 24 19 16VCI 10.60 13.95 36 26 20 17PRI 11.39 14.99 43 31 24 19Oral Reading Accuracy a FSIQ 13.47 17.73 37 27 21 17VCI 14.40 18.96 43 31 24 20PRI 14.99 19.73 45 32 25 20Note. FSIQ = Full Scale IQ, 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.