Hello all. In my advanced research class for Psychology I need to design and implement an experiment. The experiment has a few requirements. First, it needs to be a factorial design so there must be two (or more) variables. Second, one of the variables has to be manipulated by me (so an independent variable). And third, it has to be at least slightly related to Psychology.
I was originally thinking of writing two different search engines and having people search on both of them and compare how well they did. However, today I was thinking about comparing operating system user interfaces and see how well people perform tasks and how tolerant they are at trying new things. For example, I could setup four laptops, each with a different OS on it. One could be Windows XP, then Vista, then Ubuntu Gnome, and lastly Ubuntu KDE. I could tell people to do something and see how long it takes them to do it in each system. I imagine the task under XP should be pretty easy but under Vista, Gnome, and KDE might take some exploration.
So my question is, what other variables or experiment setups involving different operating system user interfaces could I try? Thanks.