WIAT3 Tech Manual.pdf - CAMPBELA

Appendix H 515Table H.5Critical Values and Base Rates by Age: Differences Between Subtest Standard Scores Required forStatistical Significance and Differences Obtained by Various Percentages of the Age-Based StandardizationSample (continued)Oral LanguageSubtestsOral Expressionvs.Early ReadingSkillsReadingComprehensionMath ProblemSolvingAlphabet WritingFluencySentenceCompositionWord ReadingEssay CompositionPseudowordDecodingNumericalOperationsOral 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%OE > ERS 12.24 17.31 40 32 25 21OE < ERS 12.24 17.31 38 29 23 21OE > RC 12.60 17.82 35 25 21 19 13.55 19.16 34 26 23 19OE < RC 12.60 17.82 43 27 21 18 13.55 19.16 55 32 25 19OE > MPS 11.83 16.74 32 25 21 18 11.31 15.99 35 27 21 19OE < MPS 11.83 16.74 37 26 21 19 11.31 15.99 35 27 23 20OE > AWF 16.44 23.25 46 36 30 26OE < AWF 16.44 23.25 46 34 30 26OE > SC 12.47 17.64 36 30 25 21 12.78 18.08 43 30 25 21OE < SC 12.47 17.64 36 29 23 20 12.78 18.08 34 26 22 20OE > WR 9.84 13.91 35 27 24 21 10.12 14.32 37 29 22 20OE < WR 9.84 13.91 33 25 21 19 10.12 14.32 33 23 20 18OE > EC 12.44 17.59 43 35 28 25 12.54 17.74 47 37 31 27OE < EC 12.44 17.59 40 31 26 24 12.54 17.74 44 33 28 24OE > PD 9.99 14.13 40 30 25 22 10.12 14.32 46 31 24 21OE < PD 9.99 14.13 37 29 23 20 10.12 14.32 39 29 24 21OE > NO 11.60 16.41 38 29 24 20 10.66 15.07 49 32 25 21OE < NO 11.60 16.41 41 27 22 20 10.66 15.07 41 32 24 21OE > ORF 11.93 16.87 43 28 24 20 10.61 15.00 36 29 23 20OE < ORF 11.93 16.87 42 32 24 21 10.61 15.00 39 32 25 22OE > SP 10.86 15.36 38 29 25 22 10.32 14.59 36 29 23 21OE < SP 10.86 15.36 34 26 23 20 10.32 14.59 34 28 22 19OE > MFA 13.83 19.56 46 33 28 24 12.70 17.96 44 33 26 23OE < MFA 13.83 19.56 48 32 26 23 12.70 17.96 41 32 27 23OE > MFS 12.23 17.29 44 29 24 22 12.46 17.63 40 31 27 23OE < MFS 12.23 17.29 47 32 26 22 12.46 17.63 43 34 28 24OE > MFM 11.80 16.69 39 31 27 24 12.21 17.26 40 33 27 24OE < MFM 11.80 16.69 48 32 26 24 12.21 17.26 45 36 30 27Copyright © 2009 NCS Pearson, Inc. Normative data copyright © 2009 NCS Pearson, Inc. All rights reserved.