WIAT3 Tech Manual.pdf - CAMPBELA

Reliability and Validity 33Table 3.5Grade-Based Standard Errors of Measurement of the Subtests and Composites: SpringGradeSubtests/Composites PK K 1 2 3 4 5 6 7 8 9 10 11 12AverageSEM aSubtestsListening Comprehension 6.36 6.18 6.36 6.00 4.97 7.35 6.00 6.54 5.20 7.04 5.81 6.00 7.19 6.18 6.26Early Reading Skills 3.35 4.97 5.20 7.04 7.94 5.93Reading Comprehension 4.97 5.41 6.36 6.87 4.50 5.61 5.41 5.61 6.18 5.81 5.81 5.61 5.71Math Problem Solving 3.97 4.74 4.74 4.97 3.97 5.41 4.74 3.97 4.74 4.24 4.24 3.97 3.97 4.24 4.44Alphabet Writing Fluency 8.35 8.35 8.35 8.35 8.35 8.35Sentence Composition 4.97 4.97 5.61 5.20 5.81 4.24 5.41 6.18 5.41 5.20 6.00 5.20 5.37Word Reading 2.12 2.12 2.60 2.60 2.12 2.60 3.00 3.00 2.60 3.67 3.00 2.12 2.67Essay Composition 5.61 5.81 5.41 5.41 5.41 5.20 5.41 5.20 5.41 5.20 5.41Essay Composition: Grammar and Mechanics b 6.18 6.18 6.18 5.81 5.81 5.81 5.81 5.81 5.81 5.81 5.92Pseudoword Decoding 2.60 2.60 3.00 3.00 2.60 2.60 2.60 3.35 2.60 4.50 3.67 2.60 3.03Numerical Operations 4.50 5.81 4.74 4.24 5.81 4.24 4.50 3.67 3.97 3.35 3.97 3.00 3.00 4.30Oral Expression 5.41 6.36 5.81 5.61 5.61 5.61 5.20 4.97 6.18 5.61 4.97 5.61 4.97 4.50 5.48Oral Reading Fluency 3.97 3.97 3.97 3.97 3.97 3.67 3.67 3.67 3.67 3.67 3.67 3.67 3.80Oral Reading Accuracy b 6.00 6.00 6.00 6.00 6.00 6.54 6.54 6.54 6.54 6.54 6.54 6.54 6.32Oral Reading Rate b 4.24 4.24 4.24 4.24 4.24 3.35 3.35 3.35 3.35 3.35 3.35 3.35 3.75Spelling 4.97 5.41 3.67 3.35 3.67 3.00 3.00 3.00 3.00 3.35 3.35 3.35 2.60 3.60Math Fluency—Addition 5.41 5.41 5.41 5.41 5.41 6.00 6.00 6.00 6.00 6.00 6.00 6.00 5.76Math Fluency—Subtraction 4.50 4.50 4.50 4.50 4.50 5.41 5.41 5.41 5.41 5.41 5.41 5.41 5.05Math Fluency—Multiplication 4.74 4.74 4.74 5.20 5.20 5.20 5.20 5.20 5.20 5.20 5.07CompositesOral Language 4.74 4.97 4.74 4.50 4.24 4.97 4.50 4.50 4.50 4.97 4.24 4.50 4.97 4.24 4.62Total Reading 2.12 2.12 2.60 2.60 2.12 2.12 2.60 2.60 2.12 3.00 2.60 2.12 2.41Basic Reading 1.50 1.50 2.12 2.12 1.50 2.12 2.12 2.12 2.12 3.00 2.60 1.50 2.08Reading Comprehension and Fluency 3.97 4.24 4.74 3.35 3.97 4.24 3.97 3.97 4.24 3.97 3.97 4.07Written Expression 5.61 4.74 4.74 3.35 3.67 3.35 3.00 3.35 3.67 3.35 3.67 3.67 3.00 3.85Mathematics 3.67 4.24 3.67 3.35 4.24 3.35 3.35 3.35 3.00 3.00 3.00 2.60 2.60 3.38Math Fluency 3.67 3.67 3.35 3.35 3.00 3.35 3.35 3.35 3.35 3.35 3.35 3.35 3.38Total Achievement 3.35 3.00 2.12 1.50 2.12 2.12 2.12 2.12 2.12 2.12 2.12 2.12 2.12 2.12 2.27Note. Spring includes the months of January–July. The standard errors of measurement are reported in standard-score units for the subtests and composites.a The average SEMs were calculated by averaging the sum of the squared SEMs for each grade and obtaining the square root of the result.b Supplemental scores.Copyright © 2009 NCS Pearson, Inc. Normative data copyright © 2009 NCS Pearson, Inc. All rights reserved.