Nancy Mather, PhD, is a Professor at the University of Arizona in the Department of Disability and Psychoeducational Studies. She specializes in the areas of assessment, reading, writing, and learning disabilities. She has served as a learning disabilities teacher, a diagnostician, and an educational consultant.

Barbara J. Wendling, MA, is the Education Director of the Woodcock-Muñoz Foundation and the Director of the Richard Woodcock Institute. She is a co-author of the manuals for the WJ IV^® and the Woodcock Interpretation and Instructional Interventions Programs. She has served as a general education teacher, a learning disabilities specialist, a product manager for a test publishing company, and an educational consultant.

Series Preface xi

Acknowledgments xiii

One Overview 1

Two How to Administer the WJ IV ACH 21

Three How to Score the WJ IV ACH 69

Four How to Interpret the WJ IV ACH 87

Five Use and Interpretation of the WJ IV Tests of Oral Language 159

Six Strengths and Weaknesses of the WJ IV ACH 204
John O. Willis and Ron Dumont

Seven Clinical Applications of the WJ IV ACH 217

Eight Illustrative Case Reports 245

Appendix A Fine Points of WJ IV ACH Administration and WJ IV OL Administration 299

Appendix B Frequently Asked Questions About the WJ IV ACH and the WJ IV OL 311

Appendix C Table for Converting z-Scores (z) to Percentile Ranks (PR) or Standard Scores (SS) 329

References 331

Annotated Bibliography 336

Index 339

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