A computational model of aesthetic value

Abstract

People invest precious time and resources on sensory experiences such as watching movies or listening to music. Yet, we still have a poor understanding of how sensory experiences gain aesthetic value. We propose a model of aesthetic value that integrates existing theories with literature on conventional primary and secondary rewards such as food and money. We assume that the states of observers' sensory and cognitive systems adapt to process stimuli effectively in both the present and the future. These system states collectively comprise a probabilistic generative model of stimuli in the environment. Two interlinked components generate value: immediate sensory reward and the change in expected future reward. Immediate sensory reward is taken as the fluency with which a stimulus is processed, quantified by the likelihood of that stimulus given an observer's state. The change in expected future reward is taken as the change in fluency with which likely future stimuli will be processed. It is quantified by the change in the divergence between the observer's system state and the distribution of stimuli that the observer expects to see over the long term.Simulations show that a simple version of the model can account for empirical data on the effects of exposure, complexity, and symmetry on aesthetic value judgments. Taken together, our model melds processing fluency theories (immediate reward) and learning theories (change in expected future reward). Its application offers insight as to how the interplay of immediate processing fluency and learning gives rise to aesthetic value judgments.

Riding the elephant in the room: Towards a revival of the optimal level of stimulation model

“…Such biased brain activity would likely make new information processing more fluent, resulting in an intrinsically rewarding effect (in line with the hedonic fluency model mentioned before). In fact, a recent computational model suggests that the better the stimulus can be predicted based on the preceding one(s), the easier it is to process, and so the greater the fluency (Brielmann & Dayan, 2021). These authors propose to re-phrase fluency theories as stating that "sensory experiences associated with lower prediction errors are more pleasurable".…”