Abstract: ............................................................................................................................... 8 Dedication ........................................................................................................................... 10 Acknowledgements ............................................................................................................. 11 List of Tables ...................................................................................................................... 12 List of Figures ..................................................................................................................... 14 Chapter One ........................................................................................................................ 15 Introduction ........................................................................................................................ 15 1.0 Research Background and Rationale: English in a Saudi Educational Context............ 15 1.2 Statement of the Problem ........................................................................................... 20 1.3 Research Questions .................................................................................................... 23 1.4 Research Objectives ................................................................................................... 23 1.5 The Significance of the Research ............................................................................... 24 Chapter Two ....................................................................................................................... 26 Literature Review Part I: Writing Acquisition, Definitions, Teaching Environments, and Approaches ......................................................................................................................... 26 2.0 Introduction ............................................................................................................... 26 2.1 Writing Skill Acquisition Studies ............................................................................... 26 2.2 Definitions of Writing Skills ...................................................................................... 28 2.3 Teaching Environments and Approaches to Writing Skills ......................................... 32 2.3.1 Traditional learning context (TLC). ..................................................................... 34 2.3.1.1 Product approach(es)..................................................................................... 35 2.3.1.2 Process approach(es). .................................................................................... 37 2.3.1.3 Genre approach(es). ...................................................................................... 40 2.3.1.4 Process genre approach(es). .......................................................................... 42 2.3.2 Writing Skills and Technology ............................................................................ 44 2.3.2.1 Blended learning context (BLC). ................................................................... 46 EFFECTS OF PROFICIENCY, ENVIRONMENT, TASK, AND TIME ON CAF 2 2.3.2.1.1 Definitions and types of BLC.................................................................. 47 2.3.2.1.2 BLC’s benefits, drawbacks, and challenges. ............................................ 48 2.3.2.1.3 BLC in Saudi Arabia. ............................................................................. 51 2.3.2.2 Online learning context (OLC). ..................................................................... 52 2.3.2.2.1 Definitions and types of OLC. ................................................................ 53 2.3.2.2.2 OLC’s benefits, drawbacks, and challenges. ........................................... 55 2.3.2.2.3 OLC in the Arab countries and in Saudi Arabia. ..................................... 59 2.4 Summary ................................................................................................................... 62 Chapter Two ....................................................................................................................... 63 Literature Review Part II: Complexity, Accuracy, and Fluency ........................................... 63 2.5 The Origin of Complexity, Accuracy and Fluency (CAF) .......................................... 63 2.6 CAF Research Challenges.......................................................................................... 70 2.7 The Challenges in Defining and Measuring CAF Constructs. ..................................... 70 2.7.1 Complexity. ......................................................................................................... 72 2.7.1.1 Syntactic complexity. .................................................................................... 73 2.7.1.1.1 Definitions. ............................................................................................. 73 2.7.1.1.2 Measurements......................................................................................... 78 2.7.1.2 Lexical complexity........................................................................................ 84 2.7.1.2.1 Definitions. ............................................................................................. 84 2.7.1.2.2 Measurements......................................................................................... 87 2.7.1.2.2.1 Lexical density. ................................................................................ 88 2.7.1.2.2.2 Lexical sophistication. ...................................................................... 89 2.7.1.2.2.3 Lexical Variation.............................................................................. 91 2.7.2 Accuracy. ............................................................................................................ 95 2.7.2.1 Definitions. ................................................................................................... 95 2.7.2.2 Measurements. .............................................................................................. 97 2.7.3 Fluency. ............................................................................................................ 101 EFFECTS OF PROFICIENCY, ENVIRONMENT, TASK, AND TIME ON CAF 3 2.7.3.1 Definitions. ................................................................................................. 101 2.7.3.2 Measurements. ............................................................................................ 104 2.8 The Challenge in Determining CAF’s Linguistic and Psycholinguistic Correspondences, Factors, and Correlations. .................................................................. 108 2.8.1 Skehan’s limited attentional capacity model. ..................................................... 111 2.8.2 Robinson’s triadic componential framework. ..................................................... 113 2.8.3 CAF studies on writing tasks and task complexity factor. .................................. 118 2.9 Summary ................................................................................................................. 127 Chapter Three ................................................................................................................... 128 Methodology ..................................................................................................................... 128 3.0 Introduction ............................................................................................................. 128 3.1 Statement of the Problem ......................................................................................... 128 3.2 Research Design ...................................................................................................... 128 3.3 Setting ..................................................................................................................... 130 3.4 Participants .............................................................................................................. 130 3.5 EFL Courses ............................................................................................................ 131 3.6 Teaching Methodology, Teaching/Learning Contexts, and Participants .................... 132 3.6.1 Traditional learning context groups for level one and six students (TLC1/TLC6). .................................................................................................................................. 133 3.6.2 Blended learning context group for level one and six students (BLC1/BLC6). ... 133 3.6.3 Online learning context groups for level one and six students (OLC1/OLC6). ... 134 3.7 Materials and Procedures for Data Collection .......................................................... 136 3.7.1 Materials: writing paragraphs/essays. ................................................................ 136 3.7.2 Procedures. ........................................................................................................ 137 3.8 Ethical Considerations ............................................................................................. 139 3.9 Data Analysis .......................................................................................................... 139 3.9.1 Complexity. ....................................................................................................... 141 3.9.1.1 Syntactic complexity analysis. .................................................................... 141 EFFECTS OF PROFICIENCY, ENVIRONMENT, TASK, AND TIME ON CAF 4 3.9.1.2 Lexical complexity analysis. ....................................................................... 143 3.9.2 Accuracy analysis. ............................................................................................. 146 3.9.3 Fluency analysis. ........