Dale's Cone of Experience

I found this article to be very interesting. After reading the article, it would be hard to find it to be factual or valid.
There is no legitimate research to back up Dale's Cone of Experience. We all learn differently, and I think it would be difficult to determine at what level each individual retains information.

Here's the link to my paper
http://www2.fairmontstate.edu/users/sharris1/reading1.doc