Preface
About the Authors
SECTION I. OVERVIEW OF BASIC DESIGN DECISIONS
1. The Marriage of Stats and Methods: ’til Death Do They Part
2. Nominal, Ordinal, Interval, or Ratio: Why Your Type of Data Really Does Matter
3. Designing Your Hypothesis: To KISS (Keep It Simple, Student) or to Complicate Matters
| How Many Variables Should I Include? |
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| How Many Participants Should I Include? |
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| How Many Independent Variables Should I Include? |
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| Including More Than One Independent Variable |
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| Choosing the Number of Levels of Each Variable |
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| Choosing Your Dependent Variables |
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| Avoiding the Unmeasurable Dependent Variables |
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| How Many Dependent Variables to Include |
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SECTION II. YOUR BASIC SPSS TOOLBOX
4. Why SPSS and Not Other Software, Your Calculator, Fingers, or Toes
5. Handling Your Data in SPSS: Columns, and Labels, and Values . . . Oh My!
| When to Create Your Data File: Yes, Even Before Data Collection |
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| Setting Up Your Data File |
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| Naming and Labeling Your Variables |
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| How to Keep Track and Remember the Details of Your Data File |
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| Creating New Variables in Your Data File: Transformations |
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| Calculating a Total or Mean Score |
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| Conducting Analyses With Only Part of Your Collected Data: Split File and Select Cases |
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6. Descriptive Statistics: Tell Me About It
| Describing Interval or Ratio Data |
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| Describing Data With Two Samples |
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SECTION III. DESIGNS, STATISTICS, INTERPRETATION, AND WRITE-UP IN APA STYLE
7. Between-Groups Designs: Celebrate Your Independence!
| Between Groups With Two Levels of an IV |
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| Independent-Samples t-Test With a Quasi-IV |
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| Between Groups With More Than Two Levels of an IV |
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| Between Groups With More Than One IV |
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8. Repeated-Measures Designs: Everybody Plays!
| One Independent Variable With Two Levels |
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| Expanding the Number of Levels for Your Independent Variable |
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| Adding Another Factor: Within-Subjects Factorial Designs |
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9. Advanced Research Designs: Complicating Matters
| Mixed Designs: One Between Variable and One Repeated-Measures Variable |
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| A Multivariate Design: Measuring It All Including More Than One Dependent Variable in Your Design |
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10. Correlational Analysis: How Do I Know If That Relationship Is Real?
| Correlational Analysis: Two Variables |
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| Prediction With Two Variables: Simple Linear Regression |
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| Prediction With Several Variables: Multiple Linear Regression |
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11. Chi Square: Staying on the Same Frequency
| One-Way Chi Square With More Than Two Levels |
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12. How Many Participants Do You Need? More Power to You!
| Finding Power in SPSS’s General Linear Model |
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| Using G*Power to Find Power |
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| Planning Sample Sizes for Your Future Research |
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SECTION IV. A SUMMARY
13. Mapping Your Decisions: You Can Get There From Here
| Making Basic Decisions About Your Design |
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| Data With Distinct Groups |
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| Interval or Ratio Data With Many Levels |
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14. APA Results Sections
| t-Test for Independent Samples (True IV) |
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| t-Test for Independent Samples (Pseudo-IV) |
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| One-Way ANOVA for Independent Groups (True IV) |
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| t-Test for Correlated Samples |
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| One-Way ANOVA for Correlated Groups (Repeated Measures) |
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| Factorial ANOVA for Correlated Groups (Repeated Measures) |
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| Factorial ANOVA for Mixed Groups |
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| Factorial ANOVA for Independent Groups |
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| Pearson’s r Correlation and Simple Regression |
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15. Frequently Asked Questions: Did I Do That?
| Questions About Research Design |
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| Questions About Analyzing Your Data |
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| Questions About Interpreting Your Data and Presenting Your Results |
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Glossary
Index
References
