This article discusses the facets of trust within interpersonal relationships and the processes by which trust relationships emerge and evolve over time. A 1996 study identified three distinct dimensions of trust: calculus-based (CBT), knowledge-based (KBT), and identification-based (IBT). Since the study, however, there has been little empirical work to test the claims of the theory or to explore more fully its practical implications. Three studies of the theory show strong support for a new multidimensional measure of trust suitable for testing the theory of trust development.