Book excerpt: Social Relations Modeling of Behavior in Dyads and Groups covers software, interpersonal perception (adult and children), the SRM with roles (e.g. in families), and applications to non-human research. Written in an accessible way, and for advanced undergraduates, graduate students and researchers, author Thomas E. Malloy strives to make inherently abstract material and unusual statistics understandable. As the social relations model provides a straightforward conceptual model of the components that make up behaviors in dyads and groups, this book will provide a powerful conceptual and methodological toolbox to analyze behaviors in dyads and groups across the sciences. This book is specifically designed to make this toolbox accessible - beyond interpersonal perception phenomena. It helps identify the relevant phenomena and dynamics surrounding behaviors in dyads and groups, and goes on to assess and analyze them empirically. - Captures essential conceptual and methodological topics around the scientific analyses of behaviors in groups and dyads - Situates the SRM in the history of dyadic research - Offers detailed guidance on research design and measurement operations - Organizes models and empirical results into easily read figures and tables - Demonstrates how SRM variances and covariances can be used as dependent measures in experiments - Conceptualizes novel phenomena in personality psychology using the SRM