Here is a cool resource I just learned about:

www.ticktockbraintalk.blogspot.com

It's maintained by a guy named Kevin McGrew who is the director of the Institute for Applied Psychometrics.
http://www.iapsych.com/IAPWEB/MeettheDirector.html#Topic2

Lots of great links to more information about how our "brain clock" or basic timing abilities influence our learning and intelligence. Interesting stuff.
Enjoy!