In this study we theoretically develop and empirically test a measurement model of consumer trust in Internet stores. In particular, we define the notion of trust based on what is commonly agreed on by scholars across disciplines. We treat trust as a second-order construct and measure it using four first-order components: perceived security, privacy, integrity, and transactional accuracy. We conducted controlled experiments using three Internet bookstores and 173 subjects. We applied confirmatory factor analysis to determine the measurement efficacies