Motion Quotient, and why you need a friend

Duje Tadin, who did the motion quotient work with one of his research team, explains that for proper results you need to use controlled conditions, because even the level of illumination in the room will affect the findings

"Unfortunately, there is no good way to compare the results across computers. For example, "suppression" is weaker at low contrast, so somebody will have a weaker suppression looking at the video in a bright room than in a dark environment. Also the actual monitor frame rate will make a big difference. What can be compared is if two people look at the video under same conditions.

This provides the same info:

http://www.telegraph.co.uk/science/science-video/10076355/US-scientists-unveil-new-IQ-measure-take-the-test.html

So, this is why you will need a friend. However, the results could potentially damage the friendship. I leave that dilemma to you.