As a discipline, we also are looking for ways to integrate related theories that have arisen from the multiple ways of building knowledge. For instance, how does the theory about stages of behavior change, developed from grounded theory methods, relate to theories of self-efficacy for health behaviors that were developed by using hypothesis-testing methods? Similarly, we are searching for ways to integrate related theories from different disciplines. For example, how do middle-range theories of health promotion in psychology relate to those in sociology and nursing? The analysis and integration of related theories may be facilitated by comparison of related theories at the same theoretical level across disciplines and arising from multiple methodologic approaches.