Because of the complexity of human behaviour a great many research variables must be constructed from the building blocks of human judgement. A teacher's warmth, a psychotherapist's ability to create rapport, a patient's inner state - these all tend ultimately to be defined by the judgements of others. The purpose of this book is to describe the design, the analysis and the meta-analysis of studies employing judgements in sufficient detail that readers can conduct such studies, and more wisely evaluate them. While the author's examples are drawn primarily from research on non-verbal behaviour, the book is designed for any investigators employing judges, observers, raters, coders, or decoders, whether or not the behaviour being assessed is non-verbal. Judgment Studies: Design, Analysis, and Meta-Analysis constitutes a unique resource for advanced students and researchers in the behavioural and social sciences. It offers the first integrated summary of methodological issues in judgement studies, and the first guide to their planning and analysis.