Three seven-point Likert-type items measure a user's perception that a website enables two-way communication, is genuinely interactive, and maintains the user's attention. The items were drawn from two different facets of McMillan and Hwang's (2002) interactivity measure and combined into a single global interactivity scale. The scale is suitable for experiments comparing high- and low-interactivity website conditions.
Sicilia, M., Ruiz, S., & Munuera, J. L. (2005). Effects of interactivity in a web site. Journal of Advertising, 34(3), 31–45.
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