WISC-IV Profiles in Children with Attention Deficit Hyperactivity Disorder and Comorbid Learning Disabilities

..........................................................................................iii TABLE OF CONTENTS...........................................................................iv LIST OF TABLES..................................................................................vii LIST OF FIGURES................................................................................viii CHAPTER 1: INTRODUCTION...................................................................1 CHAPTER 2: LITERATURE REVIEW..........................................................4 Attention Deficit Hyperactivity Disorder..........................................................4 Comorbid Learning Disorders......................................................................5 Etiological Theories...................................................................................7 Wechsler Intelligence Scale for Children Profiles................................................9 Attention Deficit Hyperactivity Disorder.....................................................11 Reading Disorder............................................................................14 Developmental Coordination Disorder...................................................16 Affected Brain Regions..............................................................................18 Conclusion...........................................................................................20 Research Aims and Study Hypotheses............................................................21 CHAPTER 3: METHODOLOGY................................................................23 Participants..........................................................................................23 Measures..............................................................................................23 Procedure................................................................................................26 Data Analysis .......................................................................................27 Data Entry and Screening................................................................27 Preliminary Analyses.....................................................................28 Primary Analyses..............................................................................28 CHAPTER 4: RESULTS.........................................................................29 CHAPTER 5: DISCUSSION.....................................................................38 ADHD Subtype Profile Differences.............................................................39 Reading Disorder and Disorder of Written Expression Profile...............................40 Developmental Coordination Disorder Profile.................................................43 Differences in Underlying Mechanisms for Working Memory and Processing Speed Abilities among Groups......................................................45 Clinical Applications...............................................................................47 Limitations and Future Directions................................................................48 REFERENCES......................................................................................51