What a bunch of crapola. I'll definitely know what to do if I ever run across a rotating grid with some yellow dots on it while I'm out riding. Sheesh!
Update: Went to the MSF website and finally found this. It's included with several other "optical illusions" that have absolutely nothing to do with riding motorcycles. They are simply brain teasers and are nothing more than entertainment.
Disagree. It is a scientific demonstration of the phenomenon they were trying to illustrate. People fixate on something and miss details that would normally be visible.
Interesting. Not fixating on a single object really is a factor in how much situational awareness you have with your surroundings. Working with this on my young teenage daughter and her driving. I'm going to show her this little eye test - thanks for the link.