Category : Psychology
Editor : Ravenio Books
ISBN :
Type : PDF, Epub and Kindle
Language : en
Views : 84
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We shall examine the validity of 16 experimental designs against 12 common threats to valid inference. By experiment we refer to that portion of research in which variables are manipulated and their effects upon other variables observed. It is well to distinguish the particular role of this chapter. It is not a chapter on experimental design in the Fisher (1925, 1935) tradition, in which an experimenter having complete mastery can schedule treatments and measurements for optimal statistical efficiency, with complexity of design emerging only from that goal of efficiency. Insofar as the designs discussed in the present chapter become complex, it is because of the intransigency of the environment: because, that is, of the experimenter’s lack of complete control.

Category : Experimental design
Editor :
ISBN : OCLC:1106903480
Type : PDF, Epub and Kindle
Language : en
Views : 84
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Category : Business & Economics
Editor : Guilford Publications
ISBN : 9781462540204
Type : PDF, Epub and Kindle
Language : en
Views : 382
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Featuring engaging examples from diverse disciplines, this book explains how to use modern approaches to quasi-experimentation to derive credible estimates of treatment effects under the demanding constraints of field settings. Foremost expert Charles S. Reichardt provides an in-depth examination of the design and statistical analysis of pretest-posttest, nonequivalent groups, regression discontinuity, and interrupted time-series designs. He details their relative strengths and weaknesses and offers practical advice about their use. Reichardt compares quasi-experiments to randomized experiments and discusses when and why the former might be a better choice. Modern moethods for elaborating a research design to remove bias from estimates of treatment effects are described, as are tactics for dealing with missing data and noncompliance with treatment assignment. Throughout, mathematical equations are translated into words to enhance accessibility.

Category : Psychology
Editor : Wadsworth Publishing Company
ISBN : UOM:39015061304716
Type : PDF, Epub and Kindle
Language : en
Views : 664
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Sections include: experiments and generalised causal inference; statistical conclusion validity and internal validity; construct validity and external validity; quasi-experimental designs that either lack a control group or lack pretest observations on the outcome; quasi-experimental designs that use both control groups and pretests; quasi-experiments: interrupted time-series designs; regresssion discontinuity designs; randomised experiments: rationale, designs, and conditions conducive to doing them; practical problems 1: ethics, participation recruitment and random assignment; practical problems 2: treatment implementation and attrition; generalised causal inference: a grounded theory; generalised causal inference: methods for single studies; generalised causal inference: methods for multiple studies; a critical assessment of our assumptions.

Category : Social Science
Editor : Oxford University Press
ISBN : 9780195387384
Type : PDF, Epub and Kindle
Language : en
Views : 214
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The role of group research designs to evaluate social work practice -- Pre-experimental group research designs -- Quasi-experimental group research designs -- Time-series research designs -- Evaluating and reporting quasi-experimental studies.

Category : Science
Editor : Wadsworth Publishing Company
ISBN : STANFORD:36105037435018
Type : PDF, Epub and Kindle
Language : en
Views : 405
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This book presents some quasi-experimental designs and design features that can be used in many social research settings. The designs serve to probe causal hypotheses about a wide variety of substantive issues in both basic and applied research. Each design is assessed in terms of four types of validity, with special stress on internal validity. Although general conclusions are drawn about the strengths and limitations of each design, emphasis is also placed on the fact that the relevant threats to valid inference are specific to each research setting. Consequently, a threat that is usually associated with a particular design need not invariably be associated with that design.

Category :
Editor :
ISBN : 098988788X
Type : PDF, Epub and Kindle
Language : en
Views :
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This open educational resource is currently in development. Please be aware that there might be updates throughout the semester as we continue adding and editing content, testing for accessibility, and incorporating feedback from pilot semester(s). If you need an accessibility accommodation or have questions about the use of this text, please contact OER services at pressbooks@uta.eduAs an introductory textbook for social work students studying research methods, this book covers various aspects of quantitative or qualitative research design. This text is currently in the pilot stage Fall 2019 with an anticipated publication date of January 2020. We recommend that you use the Chrome web browser at this time. Please be aware that there might be some cosmetic tweaks throughout the semester as we continue testing for browser support, accessibility, and export types.

Category : Social Science
Editor : SAGE Publications
ISBN : 9781483310817
Type : PDF, Epub and Kindle
Language : en
Views : 361
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Using Propensity Scores in Quasi-Experimental Designs, by William M. Holmes, examines how propensity scores can be used to reduce bias with different kinds of quasi-experimental designs and to fix or improve broken experiments. Requiring minimal use of matrix and vector algebra, the book covers the causal assumptions of propensity score estimates and their many uses, linking these uses with analysis appropriate for different designs. Thorough coverage of bias assessment, propensity score estimation, and estimate improvement is provided, along with graphical and statistical methods for this process. Applications are included for analysis of variance and covariance, maximum likelihood and logistic regression, two-stage least squares, generalized linear regression, and general estimation equations. The examples use public data sets that have policy and programmatic relevance across a variety of disciplines.

Category : Psychology
Editor :
ISBN : OCLC:1112611067
Type : PDF, Epub and Kindle
Language : en
Views : 414
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Category : Philosophy
Editor : SAGE
ISBN : 9781412961271
Type : PDF, Epub and Kindle
Language : en
Views : 1779
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"Comprising more than 500 entries, the Encyclopedia of Research Design explains how to make decisions about research design, undertake research projects in an ethical manner, interpret and draw valid inferences from data, and evaluate experiment design strategies and results. Two additional features carry this encyclopedia far above other works in the field: bibliographic entries devoted to significant articles in the history of research design and reviews of contemporary tools, such as software and statistical procedures, used to analyze results. It covers the spectrum of research design strategies, from material presented in introductory classes to topics necessary in graduate research; it addresses cross- and multidisciplinary research needs, with many examples drawn from the social and behavioral sciences, neurosciences, and biomedical and life sciences; it provides summaries of advantages and disadvantages of often-used strategies; and it uses hundreds of sample tables, figures, and equations based on real-life cases."--Publisher's description.