Rob Kall: My Early Days in Positive Psychology-- 1981-present a bit of history on my different dives in the worlds of Positive Psychology.

Rob Kall: Smile Anatomy: Emotional Self Regulation and Facial Expression Muscle Measurement and Training This chapter describes how conventional relaxation biofeedback, and zygomaticus biofeedback training paradigms can be readily integrated into an emotional self regulation model for optimizing the individual's capacity and ability to make the most of positive experience opportunities and to maximize positive affect and attitude.