This comprehensive text offers a solid foundation for asssessment of human behavior in micro, mezzo, and macro settings. The editors offer practical and concrete consideration of how human behavior is affected in different systems: individual, biological, family, community, and organizations. These influences are reviewed in terms of implications for practice. The book assembles selected readings that: provide a brief overview of each theoretical model discuss how empiricism can be applied to the model describe what methods, techniques, and interventions the model supports in order to change a client's behavior