Carousels and other animated banners on websites (for example promoting special offers) are supposedly bad for UX as the sliding animation draws the users' eye from whatever it was they were reading/looking for to look at what is moving. This causes frustration as they then have to look for what they were looking at to begin with.
I was just thinking of using animations on my call to action buttons (such as 'add to cart' button) where the words would jiggle a little once every 3 minutes or so, i.e. the words 'add', 'to', 'cart' would animate together into 'addtocart' and back again in the space of 100ms once every three minutes.
The thinking behind this is to grab the users' subconscious attention and make them look at the button I want them to click on.
My questions are:
Is this ethical?
Has anyone done this before and, if so:
what was the reaction of the customers and,
what changes did they experience to their conversion rates?