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Lecture10Handout_3slidesperpage

# Lecture10Handout_3slidesperpage - ANOVA II 4 4 95 CI 4 4 4...

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Lecture 10 Survey Research & Design in Psychology James Neill, 2011 ANOVA II 594 594 594 594 N = SOCIAL CAMPUS T EACHG EDUCAT 95% CI 4 4 4 4 4 3 2 Overview 1. One-sample t -test 2. Independent samples t -test 3. Paired samples t -test 4. One-way ANOVA 5. One-way repeated measures ANOVA 6. Factorial ANOVA 7. Mixed design ANOVA 8. ANCOVA 9. MANOVA 3 Howell (2010): Ch11 Simple Analysis of Variance Ch12 Multiple Comparisons Among Treatment Means Ch13 Factorial Analysis of Variance Ch14 Repeated-Measures Designs Ch16 Analyses of Variance and Covariance as General Linear Models Readings See also: Inferential statistics decision-making tree

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4 Difference between a set value and a variable → one-sample t -test Difference between two independent groups → independent samples t -test = BETWEEN-SUBJECTS Difference between two related measures (e.g., repeated over time or two related measures at one time) → paired samples t -test = WITHIN-SUBJECTS Previous lecture Are the differences in a sample generalisable to a population? 0 5 10 15 20 25 30 Percentage Reporting Binge Drinking in Past Month 12 to 17 18 to 25 26 to 34 35+ Age of 1997 USA Household Sample 6 Introduction to ANOVA (Analysis of Variance) • Extension of a t -test to assess differences in the central tendency ( M ) of several groups or variables. • Overall variance is partitioned into between-group and within-group variance • Levels of measurement: –Single DV: metric, –1 or more IVs: categorical
7 Example ANOVA research questions Are there differences in the degree of religious commitment between countries (UK, USA, and Australia)? 1. 1-way ANOVA 2. 1-way repeated measures ANOVA 3. Factorial ANOVA 4. Mixed ANOVA 5. ANCOVA 6. MANOVA 8 Example ANOVA research questions Do university students have different levels of satisfaction for educational, social, and campus-related domains ? 1. 1-way ANOVA 2. 1-way repeated measures ANOVA 3. Factorial ANOVA 4. Mixed ANOVA 5. ANCOVA 6. MANOVA 9 Example ANOVA research questions Are there differences in the degree of religious commitment between countries (UK, USA, and Australia) and gender (male and female)? 1. 1-way ANOVA 2. 1-way repeated measures ANOVA 3. Factorial ANOVA 4. Mixed ANOVA 5. ANCOVA 6. MANOVA

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10 Example ANOVA research questions Does couples' relationship satisfaction differ between males and females and before and after having children? 1. 1-way ANOVA 2. 1-way repeated measures ANOVA 3. Factorial ANOVA 4. Mixed ANOVA 5. ANCOVA 6. MANOVA 11 Example ANOVA research questions Are there differences in university student satisfaction between males and females (gender) after controlling for level of academic performance? 1. 1-way ANOVA 2. 1-way repeated measures ANOVA 3. Factorial ANOVA 4. Mixed ANOVA 5. ANCOVA 6. MANOVA 12 Example ANOVA research questions Does personality (5 factors) change over time (10 years old, 20 years old, and 50 years old)?
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