Do you Expect Me to Pander to the Students?' The Cold Reality of Warmth in Teaching by Robert Bruner
A quick intro:
"It is entirely possible to be warm and a tough teacher; to be warm and teach a dry technical subject; and to be warm even when you don’t feel like it. The effective teacher uses warmth as a stylistic tactic to promote student learning"
"Good teaching starts with a student-centered perspective. To gain this perspective requires direct engagement with students. Warmth, as a style, helps the engagement and thus the learning process."
Bruner, Robert F., "'Do you Expect Me to Pander to the Students?' The Cold Reality of Warmth in Teaching" (June 2005). http://ssrn.com/abstract=754504