A white paper written by Metiri Group commissioned by Cisco in 2008. I came here to fact check some claims on this YT video about a "Feynman Technique 2.0".

The claims were that

1. direct hands-on experience in unimodal learning is (on average) inferior to multi-modal learning that wasn't hand-on. viz., for "basic concepts", a more abstract learning model is better

2. "Once you get into higher-order concepts then hand-on experience is better"

Page 13 was displayed while making these claims.

These claims still need to be verified.