EARLY PARENT-BASED INTERVENTION FOR CONDUCT PROBLEMS AND ADHD Karen Jones Bangor University in fulfilment Thesis to of the requirements submitted Degree Doctor Philosophy the of of of School University Psychology, Bangor of January 2008 EarlY Intervention for Preschool ADHD Conduct Problems and ACKNOWLEDGEMENTS This thesis dissertation marks the end of a long and eventful journey, for which there I like for friendship are many people that would to acknowledge, their support and the Firstly I like Dr David Daley, Professor Judy along way. would to thank and Hutchings for their throughout excellent supervision, enthusiasm, and encouragement the course of my studies. Without their guidance on the practical, methodological and theoretical I have this aspects of research, would never completed piece of work. Discussions during feedback I have, the supervision meetings and on work produced in been in from I draw. themselves, thought, a course critical which will always Thank both for I like you so much giving me this opportunity. would also to express Chris Whitaker, for his Dr to to my gratitude ever-patient statistical guidance, and Carl Hughes, I have been have been to chair of my supervisory committee. privileged by Indeed, best have the things that surrounded wonderful colleagues. one of is I have found lifelong friends in fellow that emerged as a result of my studies my Ph. D. Pam Martin Catrin Eames I have the 'journey' and with whom shared students, have helped data Nia Griffith from beginning, the and who me with collection, and has her Ph. D., I look forward to who recently embarked on and with whom working Thank Pam, Catrin Nia for with over the next eighteen months. you and your friendship, for lots fun the for encouragement, of memories along way, and saving my difficult Thanks Michelle O'Brien, James Birchwood, for sanity at times! also to and friendship kindness. I like best luck their and would to wish all of you the very of Ph. D. Thanks Incredible Years Wales: with your s. also to the rest of the great team at Dr Tracey Bywater, for her friendship, help with ethics applications and producing draft Dilys Williams Kath papers, and calm words of encouragement, and to and Chitty for their friendly A thank be to the support. massive you must extended iv Early Intervention for Preschool ADIID Conduct Problems and families took in the North Wales Sure Start trial, this thesis who part without whom have been would not possible. I deeply indebted family: husband, leuan, for believing in am to my my always me; Marilyn David; Lisa, late Sidney; my parents and my grandmother, and grandfather, Arthur Dilys, for love, I and my parents-in-law and their support, and generosity. am for help last for grateful to all of them their with childcare over the eight years, and in I have Most often stepping at short-notice. could not managed without you. of all, in life: lovely daughters Freya thanks to the two most special people my my and Carla, I dedicate Thanks for love, to whom this thesis. your unconditional your happiness, for being how truly the and a constant reminder of precious gift of is. I love I both. parenting you and am so proud of you Social The funded by "CASE" by Economic the and study was a studentship, Research Council, North West Wales NHS Trust. and Early Intervention for Preschool ADHD Conduct Problems and v CONTENTS LIST OF TABLES xi LIST OF FIGURES xii LIST OF APPENDICES xiii SUMMARY xiv 1. GENERAL INTRODUCTION I Substantial 2 to amendment proposed study plan General Introduction 7 The Incredible Years Series 7 Incredible Years Parent Training Programmes 8 Incredible Years BASIC Parent Training Programme 8 Structure Content 8 and Theoretical Grounding 9 Programme Delivery 10 Barriers Attendance II to Supporting Research 12 Implementation Fidelity 13 North Wales Sure Start Trial 15 Incredible Years Wales 15 Evaluation Aims 15 Methodology 16 Implementation Fidelity 17 Main Findings 18 Rationale for Examining Efficacy IY for ADHD 19 the of symptoms Structure Thesis 20 of Literature Review (Chapter 2) 20 Study One (Chapter 3) 21 Study Two (Chapter 4) 22 Study Three (Chapter 5) 22 Early Intervention for Preschool ADIID Conduct Problems vi and 2. LITERATURE REVIEW: Attention Deficit Hyperactivity Disorder (ADHD) in Current findings, interventions, preschool children: recommended andfuture directions 24 Abstract 25 Introduction 26 ADHD 26 Developmental 26 course Co-Morbidity 27 ADI ID in Preschool Years 27 the Aetiology ADIID During Preschool Years 28 the of Neuropsychological. Models 29 Dual Pathway Model 30 Parenting Influences 31 Which Treatment is Appropriate for Preschool ADIID? 32 New Forest Parent-Training Package 34 Triple P Parent-Training Programme 35 Incredible Years Parent-Training Programme 36 Theoretical Grounding PT 38 of programmes Why interventions Targetting Preschool ADHD? 44 these successful at are Is Evidence-Base Supports ADHD Robust? 45 the which Outcome 48 Moderators of 49 Mode Delivery of 50 Barriers Implementation to Treatment Integrity Implementation Fidelity 51 and 52 Future Directions Conclusions 54 3. STUDY 1: fficacy The Incredible Years Basic Parent-Training Programme of as A DHD 56 interventionfor an early children with conduct problems and Abstract 57 Introduction 58 Intervention 59 Evidence for Psychosocial Intervention for Preschool Children Early Intervention for Preschool ADHD Conduct Problems and vii 60 ADHD with Rationale for Examining IY for ADHD 61 62 Aims Study the of Methods 63 63 Participants 64 Measures Screening: Parent Report Measures 64 Eyberg Child Behaviour Inventory 64 Strengths Difficulties Questionnaire 65 and Outcome: Parent Report 65 Conners Abbreviated Parent/Teacher Rating Scale 65 Observation Mother Child Behaviour 66 of and Design 67 67 Randomisation 68 Procedure Intervention Treatment Integrity 68 and 69 Results 69 Attrition 69 Attendance Intervention Conduct Problems 69 impact on of 69 Preliminary Analysis (Equivalence) Short-Term Intervention Effects 70 Short-Term Intervention Effects (Controlling for Change in Child 70 Deviance) Clinical Significance Change 72 of Discussion 73 Limitations 73 Clinical implications 74 Future 74 studies 4. STUDY 2: Efficacy Incredible Years Programme intervention of the as an early for Long-term follow-up 78 children with conductprohlems andADIID: Early Intervention for Preschool ADHD Conduct Problems and viii 79 Abstract 80 Introduction 80 Course 80 Co-Morbidity 81 Treatment 82 Parent-Training The Incredible Years Basic Parent-Training Programme 83 Present Study 85 86 Methods 86 Participants Measures 88 Screening: Parent Report Measures 88 Eyberg Child Behaviour Inventory 88 Strengths Difficulties Questionnaire 89 and Primary Outcome Measure 89 Conners Abbreviated Parent/Teacher Rating Scale 89 Observation Mother Child Behaviour 90 of and 91 Procedure Intervention Treatment Integrity 91 and 92 Results 92 Attrition 92 Attendance 92 Conduct Problems Impact Intervention on of Short-Term Findings: Impact Intervention of on 92 ADHD Symptoms 93 Preliminary Analyses 94 Long-Tenn Findings Long-Term Findings (Controlling For Observed Child 95 Deviance Scores) Clinical Significance Change in Children's Disruptive of 90 Behaviour 90 Magnitude Improvement of Discussion 98 99 Limitations ix Early Intervention for Preschool ADHD Conduct Problems and 101 Clinical Implications 5. STUDY 3: The Incredible Years Programme interventionfor as an early children 102 ADHD: Moderators with conduct problems and and mediators of outcome 103 Abstract Introduction 105 105 Interventions for Preschool ADHD Moderators And Predictors Outcome 106 of Child-Specific Moderators 107 Parent / Psychosocial Factors 108 Mediators Outcome 109 of Background Study 110 to Present Study 110 Methods 112 Participants 112 Measures 113 Demographic information: The Personal Data Health and Questionnaire 113 Maternal Depression: The Beck Depression Inventory 113 Eyberg Child Behaviour Inventory 114 Conners Parent Rating Scale 114 Strengths Difficulties Questionnaire 114 and Observation Mother Child Behaviour 115 of and 115 Randomisation 116 Procedure Intervention Treatment Integrity 116 and 118 Results 118 Attrition Attendance 118 Equivalence 118 Predictor Short-term Outcome (Baseline Follow-up 1) 119 of - Intervention Group 119 119 Control Group Predictors Long-Term Outcome (Intervention Group at of 121 Follow-ups 2 3) and Early Intervention for Preschool ADI ID Conduct Problems x and Moderators 122 Mediators 123 123 Positive Parenting Critical Parenting 125 Discussion 126 Predictors (Baseline Follow-up 1) 126 to Predictors Long-Term Outcome (Intervention Group) 127 of Moderators Outcome 129 of Mediators 129 Limitations 130 Clinical Implications 131 6. GENERAL DISCUSSION Summary findings 132 of main Overview Main Objectives 133 of Study 1 133 Study 2 134 Study 3 136 Methodological Issues 141 Clinical Implications 146 147 Future Directions 149 Conclusions 156 REFERENCES 189 APPENDICES Early Intervention for Preschool ADHD Conduct Problems and xi Tables Table I Demographic 57 characteristics of participants Table 2 Equivalence 64 of groups Table 3 Indices 89 of clinically significant change Table 4 Standardised in 112 the regression coefficients simultaneous treatment regression of outcome on candidate predictors (intervention & control group) Table 5 Standardised in 114 the regression coefficients simultaneous treatment regression of outcome on candidate predictors (intervention follow-ups two three) group at and Table 6 Moderator between improvements in 115 analyses: association factors. ADIID symptoms and risk Table 7 Correlations between Conners change scores and child follow-ups 204 deviance two, three change scores at one, and Table 8: Correlations between Conners baseline follow-up I for scores at and intervention and control group Table 9: Correlations between Conners follow-up I follow-up 2, scores at and follow-up 2 follow-up 3 (intervention to and group only)*. Table 10: Correlations between Conners baseline follow-up 1, scores at and and baseline follow-up I for observed positive parenting at and all cases (intervention and control)*
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