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Cover of Handbook of Inter-Rater Reliability, 5th Edition, Volume 2: Analysis of Quantitative Ratings, by Kilem L. Gwet, Ph.D.
Handbook of Inter-Rater Reliability · 5th Edition

Volume 2 — Analysis of Quantitative Ratings

The definitive guide to measuring agreement when ratings are numeric measurements
Author Kilem L. Gwet, Ph.D. Publisher AgreeStat Analytics ISBN 978-1-7923-5464-9

Volume 2 covers the intraclass correlation coefficient (ICC) and related methods for quantitative ratings — one-factor, random-factorial, and mixed-factorial designs, Finn's coefficient, measures of association and concordance, and multivariate inter-rater reliability — along with the statistical inference and sample-size calculations needed to use them correctly.

This edition splits the previous single-volume Handbook into two focused books: Volume 1 for categorical ratings, Volume 2 for quantitative ratings and intraclass correlation. New to this volume is a full chapter on structuring a ratings database before analysis, an expanded treatment of sample-size and power calculations for every ICC design, a new chapter on Finn's coefficient, and a new multivariate approach to inter-rater reliability based on principal component analysis.

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Nine chapters, free

Full PDF excerpts covering the book's foundational and applied chapters, exactly as they appear in the book.

Chapter 1

Introduction

What inter-rater reliability means for quantitative ratings, how to scope and design a reliability experiment, and how to choose the right ICC-based method for your data.

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Chapter 2

Setting Up a Database of Ratings for Analysis

New to the 5th edition. Practical guidance on organizing quantitative rating data — wide and long formats — before any coefficient is computed.

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Chapter 3

Intraclass Correlation: A Measure of Rater Agreement

The statistical framework behind the ICC — the ANOVA models it's built on, the Bland-Altman plot, sample size, and the multivariate ICC.

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Chapter 4

Intraclass Correlations in One-Factor Studies

Computing the ICC and its precision under Models 1A and 1B, with confidence intervals, p-values, and sample-size calculations for single-factor designs.

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Chapter 5

Intraclass Correlations under the Random Factorial Design

Inter- and intra-rater reliability coefficients when both rater and subject factors are random, with statistical inference and sample-size methods.

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Chapter 6

Intraclass Correlations under the Mixed Factorial Design

ICC methods for a fixed group of raters and a random sample of subjects, including confidence intervals, p-values, and optimal sample size.

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Chapter 7

Finn's Coefficient of Reliability

New to the 5th edition. An alternative to the ICC for small or homogeneous subject populations, where the traditional ICC approach can fail.

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Chapter 8

Measures of Association and Concordance

Pearson and Spearman correlation, Kendall's Tau and coefficient of concordance, and Lin's concordance correlation coefficient — with their advantages and limits.

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Chapter 9

Intraclass Correlation & Multivariate Analysis

Benchmarking the ICC, influence analysis to spot problem raters, and a new multivariate approach to inter-rater reliability based on principal component analysis.

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Full table of contents

Part I — Preliminaries
  • 1  Introduction1
  • 2  Setting Up a Database of Ratings for Analysis3
Part II — Intraclass Correlation Coefficients
  • 3  Intraclass Correlation: A Measure of Rater Agreement47
  • 4  Intraclass Correlations in One-Factor Studies67
  • 5  Intraclass Correlations under the Random Factorial Design115
  • 6  Intraclass Correlations under the Mixed Factorial Design174
  • 7  Finn's Coefficient of Reliability225
Part III — Additional Analysis Methods of Quantitative Reliability Data
  • 8  Measures of Association and Concordance239
  • 9  Intraclass Correlation & Multivariate Analysis264
Part IV — Appendices
  • A  Data Tables295
Handbook of Inter-Rater Reliability, 5th Edition, Volume 1 — Analysis of Categorical Ratings
Companion volume

Looking for categorical ratings instead?

Volume 1 covers chance-corrected agreement coefficients — Cohen's Kappa, Gwet's AC1/AC2, Krippendorff's alpha, and related measures — the companion to this book for researchers working with categories rather than continuous measurements.

See Volume 1