WIAT3 Tech Manual.pdf - CAMPBELA

514 Appendix HTable H.5Critical Values and Base Rates by Age: Differences Between Subtest Standard Scores Required for StatisticalSignificance and Differences Obtained by Various Percentages of the Age-Based Standardization SampleOral LanguageSubtestsListeningComprehensionvs.Early ReadingSkillsReadingComprehensionMath ProblemSolvingAlphabet WritingFluencySentenceCompositionWord ReadingEssay CompositionPseudowordDecodingNumericalOperationsOral ExpressionOral ReadingFluencySpellingMath Fluency—AdditionMath Fluency—SubtractionMath Fluency—MultiplicationDirection ofDifferenceAges 4:0–11:11 Ages 12:0–19:11Critical Value p Base Rate Critical Value p Base Rate.05 .01 ≤1% ≤5% ≤10% ≤15% .05 .01 ≤1% ≤5% ≤10% ≤15%LC > ERS 13.05 18.45 44 35 28 25LC < ERS 13.05 18.45 40 29 25 22LC > RC 13.38 18.93 39 29 24 21 14.55 20.58 34 26 22 19LC < RC 13.38 18.93 34 28 22 20 14.55 20.58 53 30 24 21LC > MPS 12.67 17.92 34 28 24 21 12.50 17.67 33 29 26 22LC < MPS 12.67 17.92 40 29 25 22 12.50 17.67 39 28 23 21LC > AWF 17.05 24.11 48 37 32 28LC < AWF 17.05 24.11 50 41 33 29LC > SC 13.27 18.76 41 32 26 23 13.85 19.58 43 32 26 22LC < SC 13.27 18.76 42 32 27 22 13.85 19.58 37 29 25 21LC > WR 10.83 15.31 49 31 27 23 11.44 16.17 47 33 26 22LC < WR 10.83 15.31 39 27 24 23 11.44 16.17 37 25 22 20LC > EC 13.23 18.72 48 33 27 25 13.62 19.27 56 40 33 29LC < EC 13.23 18.72 43 37 29 27 13.62 19.27 49 35 30 27LC > PD 10.97 15.51 47 36 29 24 11.44 16.17 48 34 28 25LC < PD 10.97 15.51 47 32 27 24 11.44 16.17 41 32 27 24LC > NO 12.45 17.61 40 31 27 24 11.91 16.85 49 34 27 25LC < NO 12.45 17.61 40 31 25 23 11.91 16.85 40 30 25 22LC > OE 13.55 19.16 35 27 23 19 13.88 19.63 40 28 23 20LC < OE 13.55 19.16 31 25 20 19 13.88 19.63 33 24 20 18LC > ORF 12.76 18.04 54 37 28 25 11.87 16.78 48 36 26 22LC < ORF 12.76 18.04 44 34 26 23 11.87 16.78 40 31 26 22LC > SP 11.77 16.64 45 34 27 25 11.61 16.42 42 31 25 22LC < SP 11.77 16.64 43 31 26 23 11.61 16.42 38 30 24 21LC > MFA 14.55 20.58 47 35 30 27 13.77 19.48 54 35 28 24LC < MFA 14.55 20.58 49 35 30 26 13.77 19.48 42 31 27 23LC > MFS 13.03 18.44 48 33 28 25 13.55 19.17 50 34 28 25LC < MFS 13.03 18.44 49 33 28 23 13.55 19.17 41 35 28 24LC > MFM 12.64 17.88 39 34 29 25 13.32 18.83 45 36 30 26LC < MFM 12.64 17.88 48 38 30 25 13.32 18.83 46 38 32 27Copyright © 2009 NCS Pearson, Inc. Normative data copyright © 2009 NCS Pearson, Inc. All rights reserved.