Note that many websites have their own advertising, unrelated to adware.
Adware is any software application in which advertising is displayed while the program is running. The authors of these applications include additional code that delivers the ads, which can be viewed through pop-up windows or through a bar that appears on a computer screen and sometimes through text links or in integrated search results. Adware may or may not track personal information. It may also gather information anonymously or in aggregate only. Users should check the EULA and Privacy policy to ensure if the adware on their machines conforms to their standards.
Vividence Connector is not adware--it is an ActiveX control that tracks a user's browsing behavior while they are participating in a short (~1 hour) website study that they have signed up to take and stops tracking their browsing as soon as they complete or exit the study. The data are used for web analytic purposes only, and users are compensated for taking the study.