This study investigates the interactivity construct in terms of its antecedents (i.e., motivations for using the Internet) and consequences (i.e., attitude toward the site, attitude toward the brand, and purchase intention). A structural equation model was developed for an empirical test, based on uses and gratification theory applied to the interactivity context. A sample of 385 college students in the United States and Korea participated in the experiment. The findings suggest that consumers who have high information motivations are more likely to engage in human-message interaction on a Web site, whereas social interaction motivations are more strongly related to human-human interaction. Both human-message and human-human interactions had a positive effect on attitude toward the site, which leads to positive attitude toward the brand and purchase intention.