Hi, I haven't heard of the learning triangle but I have just had to write a paperon adult learning styles and there is quite a lot of info out there about learning through hearing/ seeing/doing. A few of the online resources that I used were- http://www.personalitypathways.com/type_inventory.html

http://www.wilderdom.com/experientia...rningCycle.htm

http://www4.ncsu.edu/unity/lockers/u...dir/styles.htm

I hope that I am not being patronising, perhaps you already know all of this or perhaps I am totally off the mark but I just thought that I may be able to help.