This book fills a gap in international literature by providing critical reviews on variables of organizational behavior and the main psychological instruments developed to measure them. Measuring instruments developed with theoretical and methodological rigor in the field of Organizational and Work Psychology can contribute to the development of diagnostic analyses to enable organizations to implement the evidence-based changes required for their survival. These changes demand diagnoses based on precise assessments of organizational and individual variables, but many times the professionals responsible for conducting these assessments are not sure of what is the best measuring instrument available. This book is intended to serve as a guide to these professionals. The volume is divided in two parts. The first part brings together chapters dedicated to the following micro-organizational variables: Job Crafting, reactions to organizational change, Psychological Wellbeing at Work, Bridge Employment Assessment in the Work-Retirement Transition, Resilience at Work, and Leadership in Organizations. The second part presents the state-of-the-art of research on the following macro-organizational constructs:  Quality of Life at Work, Organizational Climate for Creativity, Values and Organizations, Assessments of Organizational Support, and Contributions by Social Networks Analysis and Organizational Effectiveness. The last chapter presents a critical discussion about the nature and future of organization behavior measuring. Assessing Organizational Behaviors: A Critical Analysis of Measuring Instruments is intended to help market professionals select the diagnostic instruments that best fit into their organizational reality in order to correctly assess organizational behavior. The book will also be of interest to researchers and students in the field of Organizational and Work Psychology as it provides comprehensive overviews of a wide range ofinstruments developed to measure different variables of organizational behavior.