| Description |
1 online resource (215 pages) |
| Contents |
Cover; Half Title; Title Page; Copyright Page; Table of Contents; List of Figures; List of Tables; Preface; Overview of the Book; What is New in this Edition?; Formulae and Calculations; Approaches to Power; The pwr2ppl Companion Package; Acknowledgments; 1 What is Power? Why is Power Important?; Review of Null Hypothesis Significance Testing; Effect Sizes and Their Interpretation; What Influences Power?; Central and Noncentral Distributions; Misconceptions about Power; Empirical Reviews of Power; Consequences of Underpowered Studies |
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Additional IssuesSummary; Note; 3 Independent Samples and Paired t-tests; Necessary Information; Factors Affecting Power; Key Statistics; A Note about Effect Size for Two-Group Comparisons; Example 3.1: Comparing Two Independent Groups; Example 3.2: Power for Independent Samples t using R; Example 3.3: Paired t-test; Example 3.4: Power for Paired t using R; Example 3.5: Power from Effect Size Estimate; Dealing with Unequal Variances, Unequal Sample Sizes, and Violation of Assumptions; Example 3.6: Unequal Variances and Unequal Sample Sizes; Additional Issues; Summary; Notes |
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4 Correlations and Differences between CorrelationsNecessary Information; Factors Affecting Power; Zero-Order Correlation; Example 4.1: Zero-order Correlations; Comparing Two Independent Correlations; Example 4.2: Comparing Independent Correlations; Comparing Two Dependent Correlations (One Variable in Common); Example 4.3: Comparing Dependent Correlations, One Variable in Common; Comparing Two Dependent Correlations (No Variables in Common); Example 4.4: Comparing Dependent Correlations, No Variables in Common; Note on Effect Sizes for Comparing Correlations; Additional Issues; Summary; Note |
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5 Between Subjects ANOVA (One and Two Factors)Necessary Information; Factors Affecting Power; Omnibus Versus Contrast Power; Key Statistics; Example 5.1: One Factor ANOVA; Example 5.2: One Factor ANOVA with Orthogonal Contrasts; ANOVA with Two Factors; Example 5.3: Two Factor ANOVA with Interactions; Power for Multiple Effects; Additional Issues; Summary; Note; 6 Within Subjects Designs with ANOVA and Linear; Necessary Information; Factors Affecting Power; Key Statistics; Example 6.1: One Factor Within Subjects Design; Example 6.2: Sphericity Adjustments |
| Notes |
Example 6.3: Linear Mixed Model Approach to Repeated Measures |
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Print version record |
| Form |
Electronic book
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| ISBN |
9781351695060 |
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1351695061 |
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