On the Iloveyouloveme website, Peter J. Granger guides the reader through the Psychology of Vision triangle. In his introduction Chuck Spezzano is called a "psychologist."
http://www.iloveyouloveme.com/relationship_advice/triangle_model.htm
[Update Aug. 16, 2020: Dead link]
This description of Spezzano is repeated in Granger's book, A Model for Love : Using the Psychology of Vision Model to Improve Your Relationships (2007).
http://www.iloveyouloveme.com/relationship_advice/A_Model_For_Love_Sample.pdf
[Updated link, Dec. 9, 2017] [Update Aug. 16, 2020: Dead link]