Altivo

Some research at the University of Newcastle upon Tyne, apparently on musical perception or discrimination. Here is the URL:

http://www.delosis.com/listening/measure.html

You are asked to listen to 30 pairs of musical motifs, and after each pair to tell whether they were the same or different. They appear to be seeking subjects for further research, as they ask for contact information (though I doubt they are going to fly people in from around the world or anything of the sort.)

I got all 30 correct, but they aren't that difficult really. My mate has much less formal musical training and still got 28 right. Others among our musical friends reported scores from 26 to 29.

Some may be challenging. I recommend you avoid distractions and background noise to try this.