Now in its fifth edition, this classic text helps readers learn how to design, conduct, analyze, and report high-quality clinical studies.

Alan E. Kazdin brings together a wide array of authoritative articles with his own expert insights to illustrate fundamental issues research in an accessible manner, including generating ideas, selecting participants, randomization, selecting assessment measures, analyzing data, and evaluating the implications of and publishing the results.

New to this edition are articles emphasizing the importance of diversity in research, not only cultural diversity among study participants but also in methodology (including quantitative, qualitative, and mixed methods); the role of big data; using technology such as artificial intelligence and apps; and strategies to improve transparency and accessibility, including open science practices, replication, and preregistration.

From generating hypotheses for study and selecting appropriate assessments to interpreting data and presenting findings, readers will come to better understand the whole research process as well as the importance of ethics and scientific integrity.

About the Author

Alan E. Kazdin, PhD, is a research scientist and sterling professor of psychology and child psychiatry at Yale University where he also served as chairman of the psychology department, director of the Child Study Center, director of child psychiatric services, and chair of the publications committee. He has published 50 books on methodology, parenting and child rearing, psychosocial interventions, interpersonal violence, and novel treatment delivery models. His awards include the Research Scientist and MERIT Awards from the National Institute of Mental Health and the Gold Medal Award for Life Achievement in the Science of Psychology from the American Psychological Foundation.

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