Easy Statistics in Psychology A BPS Guide

Designed for those approaching this subject for the first time, Easy Statistics in Psychology is a short, readable guide to the ideas behind statistical formulae and the benefits that a rigorous statistical approach brings to psychological research. Packed with useful analogies, it helps students get beyond the numbers. Focuses on the ideas and practicalities of statistics in psychology, rather than an array of complex numbers and formulas Covers the key tests and concepts relevant to the undergraduate student Includes a helpful section on the uses and abuses of statistics, outlining when the specific tests can be used and when they should not Written by the author of Your Undergraduate Psychology Project: A BPS Guide (Blackwell, 2004)

Mark Forshaw is Principal Lecturer in Psychology at Staffordshire University. He is a Chartered Health Psychologist and Associate Fellow of the British Psychological Society. He is the author of Your Undergraduate Psychology Project: A BPS Guide (BPS Blackwell, 2004).

Preface	p. ix
Acknowledgements	p. xi
An Introduction to Measuring Things	p. 1
Levels of Measurement	p. 1
Measures of Central Tendency	p. 3
Mean	p. 4
Mode	p. 5
Median	p. 6
Normal Distribution	p. 6
The Case of the Normal Distribution	p. 8
Variance and More	p. 11
Variance and Standard Deviation	p. 11
Sampling Distributions and the Standard Error of the Means	p. 16
The Central Limit Theorem	p. 17
Confidence Intervals	p. 17
Skew and Kurtosis	p. 18
Transformations	p. 21
Probability, Power and Error	p. 23
Hypothesis Testing and Probability	p. 23
Probability and P-Values	p. 29
Subjective Probability	p. 34
Power	p. 35
Type I and Type II Errors	p. 39
First Steps in Inferential Testing	p. 43
t-tests	p. 43
When Significant Differences Aren't What You Need	p. 47
Levene's Test	p. 48
Analysis of Variance	p. 51
Analysis of Variance (ANOVA)	p. 51
Repeated Measures ANOVA	p. 60
Mixed ANOVA	p. 60
MANOVA	p. 60
ANCOVA	p. 61
Cell Sizes in ANOVA Designs	p. 63
Sphericity	p. 65
Robustness of ANOVA	p. 66
Familywise Error	p. 66
A priori and post hoc tests	p. 68
Bonferroni's Correction	p. 69
Simple Effects Analysis	p. 70
Correlation and Regression	p. 71
Correlation	p. 71
Partial Correlation	p. 78
Attenuation of Correlation	p. 81
Heteroscedasticity	p. 82
Cronbach's Alpha	p. 84
Regression	p. 87
Multiple Regression	p. 87
Things to Keep an Eye On	p. 92
Logistic Regression	p. 94
Factor Analysis	p. 95
Goodness of Fit and Chi-Squared	p. 101
Chi-squared	p. 101
Degrees of Freedom	p. 106
Non-Parametric Tests	p. 111
Mann-Whitney U-Test	p. 112
Wilcoxon Rank-Sum Test	p. 113
Wilcoxon Matched-Pairs Signed-Rank Test	p. 113
Spearman's Rho	p. 114
Kruskal-Wallis	p. 114
Friedman's Rank Test	p. 114
Rarely Used Tests in the Seedy Underbelly of Statistics	p. 115
Kendall's Tau	p. 115
The Sign Test	p. 116
The Binomial Test	p. 117
Point-Biserial Correlation Coefficient	p. 117
The Biserial Correlation Coefficient	p. 119
The Phi Coefficient	p. 119
McNemar's Test and Cochran's Q	p. 120
Cohen's Kappa	p. 120
Jonckheere-Terpstra test	p. 122
Page's L	p. 112
Wald-Wolfowitz Runs Test	p. 123
Fabjick's P-Test	p. 123
References	p. 125
Further Reading	p. 127
Index	p. 129
Table of Contents provided by Ingram. All Rights Reserved.

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Easy Statistics in Psychology A BPS Guide

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