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The Audiovisual Assessment of Monocultural Vegetation Based on Facial Expressions

M. Nwankwo,Qi Meng,Da Yang,Mengmeng Li

Published 2025 in Forests

ABSTRACT

Plant vegetation is nature’s symphony, offering sensory experiences that influence ecological systems, human well-being, and emotional states and significantly impact human societal progress. This study investigated the emotional and perceptual impacts of specific monocultural vegetation (palm and rubber) in Nigeria, through audiovisual interactions using facial expression analysis, soundscape, and visual perception assessments. The findings reveal three key outcomes: (1) Facial expressions varied significantly by vegetation type and time of day, with higher “happy” valence values recorded for palm vegetation in the morning (mean = 0.39), and for rubber vegetation in the afternoon (mean = 0.37). (2) Gender differences in emotional response were observed, as male participants exhibited higher positive expressions (mean = 0.40) compared to females (mean = 0.33). (3) Perceptual ratings indicated that palm vegetation was perceived as more visually beautiful (mean = 4.05), whereas rubber vegetation was rated as having a more pleasant soundscape (mean = 4.10). However, facial expressions showed weak correlations with soundscape and visual perceptions, suggesting that other cognitive or sensory factors may be more influential. This study addresses a critical gap in soundscape research for monocultural vegetation and offers valuable insights for urban planners, environmental psychologists, and restorative landscape designs.

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