Essentials of Cross-Battery Assessment and X-BASS

Dawn P. Flanagan, Samuel O. Ortiz, Vincent C. Alfonso

• Publisher: Wiley
• Year: 2026
• Print ISBN:
  9781394230822
• Edition: 4
• eBook ISBN:
  9781394230839
• Topic: Psychology
• Subtopic: Research & Methodology in Psychology
• Index: Psychology

The most empirically grounded and practice-transforming edition of Cross-Battery Assessment to date

The Fourth Edition of Essentials of Cross-Battery Assessment and X-BASS delivers a comprehensive scientific update to the XBA framework and its application to SLD identification and nondiscriminatory assessment. This edition incorporates a large-scale meta-analytic database used to program X-BASS 3.0—spanning hundreds of correlation matrices, thousands of subtest-level coefficients, and data from more than 200,000 examinees—to provide unprecedented precision in composite estimation, score-cohesion evaluation, and cross-battery interpretive accuracy. Combined with updated CHC classifications and a rigorous re-evaluation of over 1,000 subtests across major cognitive, achievement, language, and neuropsychological batteries, this edition offers the most transparent and defensible cross-battery interpretive system to date.

Building on advances in cognitive theory and psychometric analyses, this edition integrates the expanded capabilities of X-BASS 3.0, including updated composite logic, refined score-cohesion rules, and enhanced decision support for evaluating cultural and linguistic influences, domain-specific cognitive strengths and weaknesses, and unexpected underachievement. New case studies illustrate how XBA and X-BASS work together to support accurate, process-focused SLD identification across reading, writing, and math, with step-by-step demonstrations of planning batteries, integrating data, and making defensible interpretations.

New to the Fourth Edition

• Fully updated CHC classifications for all tests and subtests in X-BASS
• Revised interpretive frameworks that strengthen diagnostic precision in SLD identification
• Expanded X-BASS 3.0 workflows guiding cross-battery assessment, interpretation of cultural and linguistic influences, and estimates of decision accuracy
• New case studies demonstrating real-world application of XBA and X-BASS
• Comprehensive technical appendices documenting the psychometric foundations of XBA, including cross-source comparisons and validation evidence
• A fully articulated SLD workflow guiding practitioners from PSW interpretation through ecological validity, exclusionary factors, and converging data sources
• Practitioner-friendly tables and rapid-reference tools supporting everyday decisions
• Enhanced guidance for nondiscriminatory assessment and culturally responsive practices
• Guidance on linking diagnostic findings to evidence-based interventions

School psychologists, clinical psychologists, neuropsychologists, and graduate students in assessment courses will find this Fourth Edition an authoritative resource. By connecting theory directly to practice through X-BASS integration, the book supports accurate, defensible cognitive ability evaluations across diverse populations.

Table of contents

• COVER
• TABLE OF CONTENTS
• SERIES PAGE
• TITLE PAGE
• COPYRIGHT PAGE
• LIST OF FIGURES
• LIST OF TABLES
• FOREWORD
• SERIES PREFACE
• ACKNOWLEDGMENTS
• One OVERVIEW OF CROSS‐BATTERY ASSESSMENT AND THE CROSS‐BATTERY ASSESSMENT SOFTWARE SYSTEM (X‐BASS)
• Two HOW TO ORGANIZE, ANALYZE, AND INTERPRET CROSS‐BATTERY DATA USING X‐BASS
• Three DD/C AS THE CORE OF SLD IDENTIFICATION: HISTORY, DEFINITIONS, AND CONTEMPORARY PRACTICE
• Four HOW TO USE THE PSW AND SLD EVIDENCE TABS IN X‐BASS
• Five DIAGNOSTIC CROSS‐BATTERY ASSESSMENTS FOR READING, WRITING, AND MATH REFERRALS
• Six WHEN EVALUATIONS DISAGREE BUT THE DATA DO NOT: HOW INTERPRETATION SHAPED A CHILD'S READING SUPPORT
• Seven A CASE OF CONCEPTUAL/REASONING DYSCALCULIA
• Eight CROSS‐BATTERY ASSESSMENT AND EVALUATION OF CULTURALLY AND LINGUISTICALLY DIVERSE POPULATIONS
• Nine THE COGNITIVE PROFILES OF STUDENTS WITH READING AND MATH LEARNING DIFFICULTIES AND CORRESPONDING EVIDENCE‐BASED INTERVENTIONS
• Appendix A THE CONTEMPORARY CATTELL‐HORN‐CARROLL TAXONOMY : BROAD AND NARROW ABILITY DEFINITIONS AND TASK EXAMPLES
• Appendix B EXPERT‐CONSENSUS STUDY FOR NEW TESTS/SUBTESTS INCLUDED IN X‐BASS 3.0
• Appendix C THE EVOLUTION OF COGNITIVE‐ACHIEVEMENT RELATIONS RESEARCH: PAST, PRESENT, AND FUTURE
• Appendix D INTERCORRELATIONS AND RELIABILITY COEFFICIENTS USED TO CALCULATE XBA COMPOSITES IN X‐BASS
• Appendix E CONVERGENT VALIDITY OF X‐BASS CHC COMPOSITES: A LARGE‐SCALE COMPARISON WITH NORM‐REFERENCED COMPOSITES
• Appendix F CONTINUOUS VARIABLES AND CATEGORICAL DECISIONS ABOUT SLD
• Appendix G EXCLUSIONARY CRITERIA IN THE DIAGNOSIS OF SLD
• Appendix H MANIFESTATIONS OF COGNITIVE WEAKNESSES
• Appendix I BATTERIES AND TESTS INCLUDED IN X‐BASS 3.0
• Appendix J PHONOLOGICAL AND ORTHOGRAPHIC READING ERRORS: A DIAGNOSTIC GUIDE AND RELATED INTERVENTIONS
• Appendix K PHONOLOGICAL AND ORTHOGRAPHIC SPELLING ERRORS: A DIAGNOSTIC GUIDE AND RELATED INTERVENTIONS
• Appendix L MANIFESTATIONS OF COGNITIVE STRENGTHS
• Appendix M CALCULATION OF THE FACILITATING COGNITIVE COMPOSITE IN THE DUAL DISCREPANCY/CONSISTENCY PATTERN OF STRENGTHS AND WEAKNESSES METHOD
• Appendix N MANIFESTATIONS OF AT LEAST AVERAGE ABILITY TO THINK AND REASON ACROSS GRADE LEVELS
• Appendix O CALCULATION OF DOMAIN‐SPECIFIC COGNITIVE WEAKNESS AND UNEXPECTED UNDERACHIEVEMENT IN THE DUAL DISCREPANCY/CONSISTENCY PATTERN OF STRENGTHS AND WEAKNESSES METHOD IN X‐BASS
• Appendix P ADDRESSING MEASUREMENT ERROR TO IMPROVE SPECIFIC LEARNING DISABILITY IDENTIFICATION ACCURACY AND SCHOOL PSYCHOLOGISTS' CONFIDENCE
• Appendix Q REAL‐WORLD MANIFESTATIONS OF ACADEMIC SKILL WEAKNESSES
• Appendix R SAMPLE REPORT FROM INTERVENTION LIBRARY—IL® FOR A 3RD‐GRADE STUDENT WITH A WEAKNESS IN RETRIEVAL FLUENCY
• Appendix S SAMPLE REPORT FROM INTERVENTION LIBRARY—IL® FOR A 7TH‐GRADE STUDENT WITH A WEAKNESS IN WORKING MEMORY CAPACITY
• Appendix T SAMPLE REPORT FROM INTERVENTION LIBRARY—IL® FOR A 10TH‐GRADE STUDENT WITH A WEAKNESS IN READING COMPREHENSION
• AFTERWORD
• INDEX
• END USER LICENSE AGREEMENT