Guerra Scale of Interactivity. Have you come across this typology? I stumbled upon it on a job ad for a learning designer. A search reveals that the creators were Guerra and Heffernan, then learning technology practitioners at Paychex. The article (see Reference below) is now not viewable under The Association for Talent Development (ATD, formerly ASTD). However, a few folks have discussed this in some form. Ivan Teh sums it up in his blog with key online references by MindEdge Learning Workshop; Anbar, Bolbol, Everett & Ozguven (their article); K. C., Lim in Digital Content Framework. Teh left out Mark Rollins who blogged about it 5 years ago on his blog, ETeach UK.
Briefly, it is a taxonomy with a ten-point scale that describes the levels of interactivity of e-learning content, starting from flat one-dimensional content, e.g. PDF, to multidimensional content, e.g. simulations.It is a pretty old framework (from 2004, 11 years ago!). Used alone, it has limited application beyond being a conversation starter with clients who might wish to integrate different types of interactivity in their courses. Also, a score of 10 in interactivity doth not make the course better or the best. As a believer in making learning whole, learning design must be viewed from a holistic point of view.
Guerra, T. & Heffernan, D. (2004, March). The Guerra Scale. Learning Circuits. No longer retrievable from http://www.learningcircuits.org/2004/mar2004/guerra.htm