Evidence of user habituation to support elements

I'm working on a site with a number of floating elements intended to provide support that appear on different pages in the same location. For some pages, the floating elements are considerably more relevant than others. Is there any existing research to suggest that users may become habituated to seeing the floating elements early on in the user journey, and may consequently ignore them to the point of not really seeing them when they are more relevant, losing any potential value from those elements?