'Difference scores' diaporamas de présentation

Psych 5500/6500

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Nonparametric Correlated Groups Tests

Nonparametric Correlated Groups Tests. Wilcoxon Matched-pairs Signed Ranks Test Sign Test. Alternatives to the Correlated Groups T-test.

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Visual Attention & Inhibition of Return

Visual Attention & Inhibition of Return. Data Analysis Session Dr. Jasper Robinson & Dr. Jonathan Stirk. Reminder of what we did. Before Easter we built a Posner Cueing Task Subjects had to detect the presence of a target presented in one of 2 locations (left or right box)

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Power

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AKA Dependent Samples Tests AKA Matched-Pairs Tests Cal State Northridge ? 320

Hypothesis Tests: Two Related Samples. AKA Dependent Samples Tests AKA Matched-Pairs Tests Cal State Northridge ? 320 Andrew Ainsworth PhD. Major Points. Related samples? Matched Samples? Difference scores? An example t tests on difference scores Advantages and disadvantages

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Comparing Two Means: One-sample & Paired-sample t -tests

Comparing Two Means: One-sample & Paired-sample t -tests. Lesson 13. Inferential Statistics. Hypothesis testing Drawing conclusions about differences between groups Are differences likely due to chance? Comparing means t -test: 2 means Analysis of variance: 2 or more means ~.

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Hypothesis Tests: Two Related Samples

Hypothesis Tests: Two Related Samples. Related Samples. The same participants give us data on two measures e. g. Before and After treatment Aggressive responses before video and aggressive responses after With related samples, someone high on one measure is probably high on other. Cont.

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Hypothesis Testing

Hypothesis Testing. Repeated-Measures Data with One Sample. Repeated-Measures Testing with One Sample. One-Sample Z/T-Test: Looks at difference between one sample and its population at one point in time

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Measurement Theory

Measurement Theory. Emily H. Wughalter, Ed.D . Measurement & Evaluation Spring 2010. Reliability. Reliability means the consistency in the measurement from one testing to the next trial. Validity.

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NON-PARAMETRIC SUBSTITUTES FOR t-TESTS

NON-PARAMETRIC SUBSTITUTES FOR t-TESTS. Parametric Non-Parametric Independent t Wilcoxon Rank-Sum or Mann-Whitney Dependent t Wilcoxon T. WILCOXON RANK-SUM TEST. Purpose: Compare the medians of two groups. Design: between subjects Assumptions: independent observations

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Rebecca Reed Arizona Space Grant Consortium The University of Arizona April 17, 2010

Using Fitness Devices and Global Positioning System (GPS) Technology in Measuring Energy Expenditure and Distance Walked Over Flat and Incline Surfaces. Rebecca Reed Arizona Space Grant Consortium The University of Arizona April 17, 2010. A special thanks to:.

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Variability

Variability. Chapter 4. What is it?. How much difference there is from person to person How spread out scores are No variability = all scores are the same. Why do we care?. Less variability = more know about the population based on the sample

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Robust Between Groups Factorial and Robust RM

Robust Between Groups Factorial and Robust RM. Brief examples. Robustitude. As in most statistical situations there would be a more robust method for going about factorial anova

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Sphericity

Sphericity. More on sphericity. With our previous between groups Anova we had the assumption of homogeneity of variance With repeated measures design we still have this assumption albeit in a different form. More on sphericity.

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Communication Audits

Communication Audits. Chapter 6 Phase 4: The International Communication Association Survey. ICA Survey. Information Received Sending Information to Others Follow-Up on Information Sent Sources of Information Timeliness of Information Organizational Communication Relationships

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Wilcoxon Tests

Wilcoxon Tests. What is the Purpose of Wilcoxon Tests?. These are nonparametric alternatives to the independent and dependent samples t-tests. Based on ordinal data. Normal distributions are not required. What is the Purpose of Wilcoxon Tests?.

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Effect Size

Effect Size. Repeated Measures. Measures of association. Measures of association are conducted in the same way for repeated measures design In general, partial ? 2 is SS effect /(SS effect + SS error )

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Introduction

Adult Attachment Security and Automatic Relationship Attitudes: A Social Cognitive Measure of Working Models of Attachment Jeffery E. Aspelmeier Radford University Department of Psychology. Introduction

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