Admittedly this is a rare scenario, but there are some instances where providing the user with a quick method for hiding a page or navigating elsewhere is needed.
The typical scenario being a non-profit site where the user might want access to information without others becoming aware. That is, if a person were to walk in the room whilst the user is viewing the site, he/she may quickly navigate away.
I'm struggling to find anything in the way of research into this and (although dangerously close to being an oxymoron) what might be the most subtle, yet intuitive positioning for the CTA to be placed.
Two differing examples of this can be seen at selfharm.co.uk and Childline, where the CTA's have been placed above the fold on the edge of the content wrapper, and a fixed positioning on the right hand side of the browser window, respectively.
I have a number of concerns with the positioning of the first example - first and foremost, the CTA scrolls out of view as the user navigates below the fold, therefore defeating the purpose of the CTA entirely. Secondly, it is placed between two other CTA's, and whilst this may have been done for subtlety it may be a little too subtle for the user.
The second example greatly improves upon this, it's fixed positioning means it is always in view and easily accessible. It's bright and does draw the attention of the user. However, it is quite a small target and a user will hurriedly try to seek it, which could prove difficult.
So my question/s is/are:
Where might be the most intuitive positioning for a CTA of this sort?
What might be the most appropriate form for this CTA?
As always, links to any research/articles on this are greatly appreciated.