| Introduction to the Fourth Edition |  | v |  | 
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|  | Part A Introduction to Research Methods |  |  | 1 | (28) | 
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|  | Introduction to Empirical Research |  |  | 3 | (2) | 
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|  | Experimental vs. Nonexperimental Studies |  |  | 5 | (2) | 
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|  | Experimental vs. Causal-Comparative Studies |  |  | 7 | (2) | 
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|  | Types of Nonexperimental Research |  |  | 9 | (2) | 
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|  | Variables in Nonexperimental Studies |  |  | 11 | (2) | 
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|  | Variables in Experimental Studies |  |  | 13 | (2) | 
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|  | Research Hypotheses, Purposes, and Questions |  |  | 15 | (2) | 
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|  | Operational Definitions of Variables |  |  | 17 | (2) | 
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|  | Quantitative vs. Qualitative Research: I |  |  | 19 | (2) | 
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|  | Quantitative vs. Qualitative Research: II |  |  | 21 | (2) | 
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|  | Ethical Considerations in Research |  |  | 25 | (2) | 
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|  | The Role of Theory in Research |  |  | 27 | (2) | 
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|  | Part B Reviewing Literature |  |  | 29 | (14) | 
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|  | Reasons for Reviewing Literature |  |  | 31 | (2) | 
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|  | Locating Literature Electronically |  |  | 33 | (2) | 
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|  | Organizing a Literature Review |  |  | 35 | (2) | 
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|  | Writing a Literature Review |  |  | 37 | (4) | 
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|  |  | 43 | (14) | 
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|  | Biased and Unbiased Sampling |  |  | 45 | (2) | 
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|  | Simple Random and Systematic Sampling |  |  | 47 | (2) | 
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|  | Stratified Random Sampling |  |  | 49 | (2) | 
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|  | Other Methods of Sampling |  |  | 51 | (2) | 
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|  | Introduction to Sample Size |  |  | 53 | (2) | 
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|  | A Closer Look at Sample Size |  |  | 55 | (2) | 
|  |  | 57 | (26) | 
|  |  | 59 | (2) | 
|  |  | 61 | (2) | 
|  |  | 63 | (4) | 
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|  | Judgmental--Empirical Validity |  |  | 67 | (4) | 
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|  | Reliability and Its Relationship to Validity |  |  | 71 | (4) | 
|  |  | 75 | (2) | 
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|  | Norm- and Criterion-Referenced Tests |  |  | 77 | (2) | 
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|  | Measures of Optimum Performance |  |  | 79 | (2) | 
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|  | Measures of Typical Performance |  |  | 81 | (2) | 
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|  | Part E Experimental Design |  |  | 83 | (12) | 
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|  | True Experimental Designs |  |  | 85 | (2) | 
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|  | Threats to Internal Validity |  |  | 87 | (2) | 
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|  | Threats to External Validity |  |  | 89 | (2) | 
|  |  | 91 | (2) | 
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|  | Quasi-Experimental Designs |  |  | 93 | (2) | 
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|  | Part F Understanding Statistics |  |  | 95 | (32) | 
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|  | Descriptive and Inferential Statistics |  |  | 97 | (2) | 
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|  | Introduction to the Null Hypothesis |  |  | 99 | (2) | 
|  |  | 101 | (2) | 
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|  | Descriptions of Nominal Data |  |  | 103 | (2) | 
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|  | Introduction to the Chi Square Test |  |  | 105 | (2) | 
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|  | A Closer Look at the Chi Square Test |  |  | 107 | (2) | 
|  |  | 109 | (2) | 
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|  | The Mean, Median, and Mode |  |  | 111 | (2) | 
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|  | The Mean and Standard Deviation |  |  | 113 | (2) | 
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|  | The Median and Interquartile Range |  |  | 115 | (2) | 
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|  | The Pearson Correlation Coefficient |  |  | 117 | (2) | 
|  |  | 119 | (2) | 
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|  | One-Way Analysis of Variance |  |  | 121 | (2) | 
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|  | Two-Way Analysis of Variance |  |  | 123 | (2) | 
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|  | Practical Significance of Results |  |  | 125 | (2) | 
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|  | Part G Effect Size and Meta-Analysis |  |  | 127 | (42) | 
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|  | Introduction to Effect Size (d) |  |  | 129 | (2) | 
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|  | Interpretation of Effect Size (d) |  |  | 131 | (2) | 
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|  | Effect Size and Correlation (r) |  |  | 133 | (2) | 
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|  | Introduction to Meta-Analysis |  |  | 135 | (2) | 
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|  | Meta-Analysis and Effect Size |  |  | 137 | (2) | 
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|  | Meta-Analysis: Strengths and Weaknesses |  |  | 139 | (30) | 
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|  | A. Examining the Validity Structure of Qualitative Research |  |  | 141 | (8) | 
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|  | B. Excerpts from Literature Reviews |  |  | 149 | (4) | 
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|  | C. Electronic Databases for Locating Literature |  |  | 153 | (2) | 
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|  | D. Electronic Sources of Statistical Information |  |  | 155 | (6) | 
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|  | E. Other Methods of Determining Reliability |  |  | 161 | (2) | 
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|  | F. A Closer Look at the Standard Deviation |  |  | 163 | (2) | 
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|  | G. A Closer Look at Effect Size |  |  | 165 | (2) | 
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|  | 1. Table of Random Numbers |  |  | 167 | (1) | 
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|  | 2. Table of Recommended Sample Sizes |  |  | 168 | (1) | 
| Index |  | 169 |  |