What is Dual Coding?

The following video describes dual coding theory as well as cognitive load. The point of the video is briefly explain the main concepts around this theory. For more in depth analysis I would suggest the literature and in fact I will post some that I have written. Also, here is the image I used in the video if anyone would like to use it (for educational purposes citing me of course).

[youtube=http://www.youtube.com/watch?v=SwHaq3xlNdA]

dual coding