University of Memphis researchers Stan Franklin and Uma Ramamurthy have released a new paper titled, Motivations, Values and Emotions: Three Sides of the Same Coin (PDF format). The paper talks about the interrelationships of the three concepts in autonomous agents, whether they are robots or humans. "Motivations prime actions, values serve to choose between motivations, emotions provide a common currency for values, and emotions implement motivations." As always, one needs to understand how the researchers use the terms. In this case, the authors seem to be using the words feelings and emotions in opposite roles from those I've seen defined in the past. They define feelings as raw sensory inputs such as heat, pain, or thirst and emotions are defined as feeling with cognitive content. Normally, I see feeling defined as the subjective or phenomenological aspect of emotion rather than the other way round. Of course, many people still use the two words interchangeably, so any distinction is helpful. Otherwise, the authors rely on the LIDA (Learning Intelligent Distributed Agent) model of cognition.