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How Many Subjects

Author: Helena Chmura Kraemer
Publisher: SAGE Publications
ISBN: 1483319555
Size: 57.24 MB
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With increased emphasis on helping readers understand the context in which power calculations are done, this Second Edition of How Many Subjects? by Helena Chmura Kraemer and Christine Blasey introduces a simple technique of statistical power analysis that allows researchers to compute approximate sample sizes and power for a wide range of research designs. Because the same technique is used with only slight modifications for different statistical tests, researchers can then easily compare the sample sizes required by different designs and tests to make cost-effective decisions in planning a study. These comparisons demonstrate important principles of design, measurement, and analysis that are rarely discussed in courses or textbooks, making this book a valuable instructional resource as well as a must-have guide for frequent reference.

Physical Activity Assessments For Health Related Research

Author: Greg Welk
Publisher: Human Kinetics
ISBN: 9780736037488
Size: 13.42 MB
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And examples -- References -- Construct validity in physical activity research / Matthew T. Mahar and David A. Rowe -- Definitional stage -- Confirmatory stage -- Theory-testing stage -- Summary -- References -- Physical activity data : odd distributions yield strange answers / Jerry R. Thomas and Katherine T. Thomas -- Overview of the general linear model and rank-order procedures -- Determining whether data are normally distributed -- Application of rank-order procedures -- Data distributions and correlation -- Extensions of GLM rank-order statistical procedures -- Summary -- Endnote -- References -- Equating and linking of physical activity questionnaires / Weimo Zhu -- What is scale equating? -- Equating methods -- Practical issues of scale equating -- Remaining challenges and future research directions -- Summary -- References

Design Sensitivity

Author: Mark W. Lipsey
Publisher: SAGE
ISBN: 9780803930636
Size: 61.59 MB
Format: PDF, Kindle
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All researchers face an important challenge - designing research that will have sufficient sensitivity to detect those effects it purports to investigate. Sample size, validity and sensitivity, experimental error, subject variability, and the type of statistical analysis all influence the sensitivity of a research design. Through careful explanations and selection of examples, Lipsey examines the concept of design sensitivity and explains statistical power and the elements that determine it.

Die Macht Der Gewohnheit Warum Wir Tun Was Wir Tun

Author: Charles Duhigg
Publisher: ebook Berlin Verlag
ISBN: 3827070740
Size: 52.93 MB
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Seit kurzem versuchen Hirnforscher, Verhaltenspsychologen und Soziologen gemeinsam neue Antworten auf eine uralte Frage zu finden: Warum tun wir eigentlich, was wir tun? Was genau prägt unsere Gewohnheiten? Anhand zahlreicher Beispiele aus der Forschung wie dem Alltag erzählt Charles Duhigg von der Macht der Routine und kommt dem Mechanismus, aber auch den dunklen Seiten der Gewohnheit auf die Spur. Er erklärt, warum einige Menschen es schaffen, über Nacht mit dem Rauchen aufzuhören (und andere nicht), weshalb das Geheimnis sportlicher Höchstleistung in antrainierten Automatismen liegt und wie sich die Anonymen Alkoholiker die Macht der Gewohnheit zunutze machen. Nicht zuletzt schildert er, wie Konzerne Millionen ausgeben, um unsere Angewohnheiten für ihre Zwecke zu manipulieren. Am Ende wird eines klar: Die Macht von Gewohnheiten prägt unser Leben weit mehr, als wir es ahnen.

Forschungsmethoden Und Evaluation In Den Sozial Und Humanwissenschaften

Author: Nicola Döring
Publisher: Springer-Verlag
ISBN: 3642410898
Size: 12.36 MB
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Der Klassiker zu den Forschungsmethoden – rundum erneuert, didaktisch verbessert und aktueller denn je! Dieses Buch ist ein fundierter und verlässlicher Begleiter für Studierende, Forschende und Berufstätige – da ist alles drin: Grundlagen: Wissenschaftstheorie, Qualitätskriterien sowie ethische Aspekte. Anwendung: Alle Phasen des Forschungsprozesses von der Festlegung des Forschungsthemas, des Untersuchungsdesigns und der Operationalisierung über Stichprobenziehung, Datenerhebungs- und Datenanalysemethoden bis zur Ergebnispräsentation. Vertiefung: Effektgrößen, Metaanalysen, Strukturgleichungsmodelle, Evaluationsforschung. Die 5. Auflage wurde grundlegend überarbeitet: Klarheit: Verbesserte Gliederung der Kapitel sowie des gesamten Buches. Aktualität: Beiträge zu Online-Methoden, Mixed-Methods-Designs und anderen neueren Entwicklungen. Lernfreundlichkeit: Viele Abbildungen, Tabellen, Definitionsboxen, Cartoons, Übungsaufgaben und Lernquiz mit Lösungen. Praxisbezug: Reale Studienbeispiele aus verschiedenen sozial- und humanwissenschaftlichen Fächern (z.B. Psychologie, Kommunikationswissenschaft, Erziehungswissenschaft, Medizin, Soziologie). Eine Begleit-Website bietet Lern-Tools für Studierende und Materialien für Lehrende.

Statistical Power Analysis For The Behavioral Sciences

Author: Jacob Cohen
Publisher: Routledge
ISBN: 1134742703
Size: 50.82 MB
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Statistical Power Analysis is a nontechnical guide to power analysis in research planning that provides users of applied statistics with the tools they need for more effective analysis. The Second Edition includes: * a chapter covering power analysis in set correlation and multivariate methods; * a chapter considering effect size, psychometric reliability, and the efficacy of "qualifying" dependent variables and; * expanded power and sample size tables for multiple regression/correlation.

Statistical Power Analysis

Author: Kevin R. Murphy
Publisher: Routledge
ISBN: 131768057X
Size: 35.90 MB
Format: PDF, ePub
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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 readers apply the concepts presented. -Expanded coverage of power analysis for multifactor analysis of variance (ANOVA) to show readers how to analyze up to four factors with repeated measures on any or all of the factors. -Re-designed and expanded web based One Stop F Calculator software and data sets that allow users to perform all of the book's analyses and conduct significance tests, power analyses, and assessments of N and alpha needed for traditional and minimum-effects tests. -Easy to apply formulas for approximating the number of subjects required to reach adequate levels of power in a wide range of studies. Intended as a supplement for graduate/advanced undergraduate courses in research methods or experimental design, intermediate, advanced, or multivariate statistics, statistics II, or psychometrics, taught in psychology, education, business, and other social and health sciences, researchers also appreciate the book‘s applied approach.

Statistik F R Dummies

Author: Deborah J. Rumsey
Publisher: John Wiley & Sons
ISBN: 3527692762
Size: 23.75 MB
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Von A wie Ausreißer bis Z wie Z-Verteilung Entdecken Sie mit Statistik für Dummies Ihren Spaß an der Statistik und werfen Sie einen Blick hinter die Kulissen dieser komplizierten, aber hilfreichen Wissenschaft! Deborah Rumsey zeigt Ihnen das nötige statistische Handwerkszeug wie Stichprobe, Wahrscheinlichkeit, Bias, Median, Durchschnitt und Korrelation. Sie lernen die verschiedenen grafischen Darstellungsmöglichkeiten von statistischem Material kennen und werden über die unterschiedlichen Methoden der Auswertung erstaunt sein. Schärfen Sie mit diesem Buch Ihr Bewusstsein für Zahlen und deren Interpretation, sodass Ihnen keiner mehr etwas vormachen kann!

Handbook Of Applied Social Research Methods

Author: Professor Leonard Bickman
Publisher: SAGE
ISBN: 9780761906728
Size: 54.69 MB
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The Handbook of Applied Social Research Methods shows how to make intelligent and conscious decisions so that researchers can refine and hone their research questions as new knowledge is gained, unanticipated obstacles are encountered, or contextual shifts take place - all key elements in the iterative nature of applied research. With examples and illustrations from the authors' own experiences, this book gives readers a practical guide to conducting applied research.

Understanding Nursing Research

Author: Nancy Burns
Publisher: Elsevier Health Sciences
ISBN: 1437726550
Size: 39.41 MB
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Learn how to evaluate and apply research with the #1 nursing research book! Understanding Nursing Research: Building an Evidence-Based Practice is known for its authoritative content, a time-tested step-by-step approach, and abundant use of research examples. With improved clarity and readability, the new edition strengthens its focus on evidence-based practice to better demonstrate how the steps of the research process relate to evidence-based nursing. Written by two of the leaders in the field of nursing research, Nancy Burns and Susan K. Grove, this full-color text offers unique insights into understanding, appraising, and applying published research to evidence-based practice. Authoritative content is written by two of the true pioneers in nursing research, who offer unique, first-hand insights into the field. Research examples provide practice in working with published studies, with many of the examples including Critical Appraisal and Implications for Practice sections. A clear, step-by-step organization introduces the research process and demonstrates how this systematic framework relates to evidence-based practice. An expanded emphasis on evidence-based practice helps you develop skills in studying and appraising published research, so you are prepared for your role in working with research evidence. Enhanced coverage of qualitative research allows prepares you to approach research questions and clinical questions with an unbiased view of the researcher's methodology. Two different appraisal processes are included: A traditional in-depth critical appraisal process prepares you for graduate-level work in research. A concise, practice-focused research appraisal process equips you for quick and accurate evaluation of the applicability of research findings to clinical practice. Updated research examples prepare you for evidence-based practice by using the physiologic conditions and hospitalized patients seen in clinicals.