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Zusatztext "The detailed coverage of conducting a full power analysis, as well as the simple estimates ... allows students to not only understand the benefit of power analysis, but also gives them a good guideline for adequate sample sizes to ensure that they at least come close to the adequate sample. ... Faculty members …should expose their students... to this book. …It is written in a way that is approachable to graduate level students." – Brigitte Vittrup, Texas Women’s University, USA"This concise yet detailed text fills a vital niche for graduate students and seasoned researchers alike, providing an understanding of the basic tenets of statistical power, and its application to a variety of hypothesis testing scenarios."- Chris Stride, University of Sheffield, UK"The explanation of how power can be estimated using a unified method of F transformations ... helps readers understand the workings behind the mysterious tables that are available elsewhere. ... I use this book in my research design course.... The sections on determining sensitivity and decision criteria are... frequently missed in other texts. ... The authors write clearly." – Patricia Newcomb, University of Texas at Arlington, USA"Ihave always liked the critical discussion of the traditional null hypothesis, and the minimum effect size alternative central to this book. ... The [new edition] ... benefits from adding discussion about various designs such as multifactorial ANOVA … [which] offer ideas [on] how to plan more complex experiments and expand the applicability of power analysis." – Andres Kriete, Drexel University, USA Informationen zum Autor Kevin R. Murphy is an Affiliate Faculty member at Colorado State University.Brett Myors is anAdjunct Professor of Psychology at Griffith University in Australia.Allen Wolach is a retired Professor of Psychology from Illinois Institute of Psychology. Klappentext Through the use of simple procedures and examples, this text shows readers with little expertise in statistics how to obtain the values needed to carry out the power analysis for research. Numerous examples demonstrate how to choose the criterion for defining statistically significant outcomes. The book reviews how to determine: the sample size needed to achieve desired levels of power; the level of power needed in a study; the size of effect that can be reliably detected by a study; and criteria for statistical significance. The book helps students and researchers design and diagnose existing studies. A web based calculator and data sets allow users to perform all of the book's analyses. Zusammenfassung Noted for its accessible approach, this text applies the latest approaches of power analysis to both null hypothesis and minimum-effect testing using the same basic unified model. Through the use of a few simple procedures and examples, the authors show readers with little expertise in statistical analysis how to obtain the values needed to carry out the power analysis for their research. Illustrations of how these analyses work and how they can be used to choose the appropriate criterion for defining statistically significant outcomes are sprinkled throughout. The book presents a simple and general model for statistical power analysis based on the F statistic and reviews how to determine: the sample size needed to achieve desired levels of power; the level of power needed in a study; the size of effect that can be reliably detected by a study; and sensible criteria for statistical significance. The book helps readers design studies, diagnose existing studies, and understand why hypothesis tests come out out the way they do. The fourth edition features: -New Boxed Material sections provide examples of power analysis in action and discuss unique issues that arise as a result of applying power analyses in different designs. -Many more worked examples help read...
