Alejandro has published a paper about the effects of aesthetics in mental health (particularly anxiety).

Fatima Maria Felisberti, C Alejandro Parraga, Neil Harrison
“Psychological Determinants of Aesthetic and Affective Preferences for Nature and Urban Scenes: Anxiety, Nature Exposure, and Mental Imagery”
Empirical Studies of the Arts, 44(1), 22-26 (2025)
https://doi.org/10.1177/02762374251334989