I'm guestimating based on votes. For a true experiment, I would need to do this multiple times and then make conclusions about the 5 (or however many) trials. Also, I am making the assumption that more people clicked on my post based off of more votes (sorry if this isn't completely true!). I am limited to how many things I can post in one day, and I don't want my reputation to be really damaged because I have puppies and boobs all over my page!! So I just tried everything once (except for the tutorials), and I made observations. If you noticed, the fist picture (and thumbnail) was just a nice picture that didn't have much to do with my post, so this post itself is also an experiment in some ways!