Abstract: The present invention, in its broadest expression, includes (a) the Pleasure-Arousal-Dominance (PAD) table of emotions that makes it possible (b) to convert emotion terms to their respective PAD values, (c) a formula for working back from any specific set of PAD values to derive a single emotion term that best fits that particular combination of PAD values, (d) a formula for calculating the distance between a preselected set of PAD values and the closest emotion term that matches those PAD values, (e) a method for calculating the average emotional response of a group to any situation or stimulus, thereby permitting the derivation of a single emotion term that best represents the average emotional experience of the group. (f), a generic procedure for deriving emotion terms from multidimensional statistical models. The present invention finds use as an emotion simulator, particularly in the field of closed and open loop systems, such as a heating system, in order to represent how the system is performing.