Three books in one! Get the entire MadMethods series in this special edition for one low price!

1. Effect Size Matters: Learn how to do research that matters and get results that make sense. This plain-English guide will show you how to the answer the dreaded "So what?" question. It will teach you how to interpret the substantive or practical significance of your results and convey them in ways that are meaningful to stakeholders.

2. Statistical Power Trip: Many studies lack the statistical power to find effects. This jargon-free guide will show you how to boost the power of underpowered research and design studies that succeed. Learn how to calculate sample sizes and boost your funding prospects with power analyses that dazzle.

3. Meta-Analysis Made Easy: Will your research make a unique contribution? Or are you reinventing the wheel? Using examples proven in the field and tested in the classroom, this quick guide to meta-analysis will show you how to draw conclusions even from inconclusive studies. It will help you discover patterns of meaning in disparate research and uncover gold mines for further research.

What readers are saying:

★★★★★ "Who knew statistics was this interesting? I learned a lot!"

★★★★★ "I was impressed by the clarity (and very amusing examples) in this text."

★★★★★ "Some people write to impress and others to instruct. This book is for instruction."

★★★★★ "Exceptionally lucid overview of power analysis, effect sizes, and sample size calculations."

★★★★★ "The clearest presentation of three complex and important subjects."

★★★★★ "An easy read on a complex topic. Great resource!"

★★★★★ "Clearly explains the concepts behind statistical mechanics."

★★★★★ "Easy to read, understand, and follow."

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