Thanks for the comment. Thoughts not dissimilar from yours are what drove us to undertake these studies. :) I definitely suspect that predictive processing in

Thanks for the comment. Thoughts not dissimilar from yours are what drove us to undertake these studies. :) I definitely suspect that predictive processing in the brain is part of the story, and we discuss that a bit in the paper. Interestingly, local entropy is highly correlated with our "spikiness" measure, the spectral centroid. However, where your comment focuses on macro-level regularity, like Bach versus Rush, our study focused on micro-level texture, like the hum of a box fan versus squealing brake pads. Although macro-level regularity definitely has an impact on emotion perception as well! This is something my other research has touched on, e.g.: https://www.pnas.org/content/110/1/70 https://www.pnas.org/content/110/1/70 We also found that "spikiness" predicted emotional arousal for both positive and negative emotions. E.g., "angry" and "excited" are both spiky across the senses, while "sad" and "peaceful" are both smooth. So the results can't be driven solely by uncertainty becoming associated with negative emotion. Thanks for your thoughts! And here's a link to a preprint of the paper: https://psyarxiv.com/wucs4 https://psyarxiv.com/wucs4