Before we begin asking you questions, you are about to watch a short video. Make sure your volume is up and you are able to focus on the video. The video will last less than a minute.

At the end of the video you are going to see an person with shoulder length hair appear. This person is on the right of the image you see here. We want you to take special notice of him. We will refer to him later.

First enter your subject ID below.

Then when you’re ready, click the start button below and the video will begin.