Physiological and Psychological Effects of Visual Stimulation with Green Plant Types

Abstract

This study was designed to assess the physiological and psychological benefits of visually looking at foliage plants in adults. This study involved 30 adults in their 20s (11 males, 19 females), and using a crossover design, participants looked at four different types of visual stimuli, namely, real plants, artificial plants, a photograph of plants, and no plants for 5 min. Brain waves were measured while viewing each type of plant, and a subjective evaluation of emotions was performed after each visual stimulus. Semantic differential methods (SDM) and Profile of Mood States (POMS) were used for the subjective evaluation. During the real plant visual stimulation, relative theta (RT) power spectrum was increased in the bilateral occipital lobes, while relative high beta (RHB) power spectrum was reduced in the left occipital lobe, indicating a reduction in stress, anxiety, and tension. The subjective survey results revealed that when looking at real plants, the participants exhibited significantly higher “comfort,” “natural,” and “relaxed” scores as well as an increase in positive mood conditions. In conclusion, among the four types of plants, visual stimulation with real plants induces physiological relaxation in adults and has a positive psychological effect.

The Effect of Visualization Techniques on Students of Occupational Therapy during the First Visit to the Dissection Room

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Implementing Vertical Greenery on Office Façade Opening to Improve Indoor Light Quality

“…The difference between real and artificial leaves was in a physiological calm and relaxing sense when touching the real plants. Jeong and Park (2021) experiment looked at 4 kinds of visual stimuli which were the real plants, the artificial plants, the plant's picture, and no plants at all; revealed that the real plants give the most relaxing, comfortable, and natural score; which meant positive mood conditions. That's why natural plants are needed as an important element for the human environment.…”

Psychological and physiological effects of visual stimulation with real plants and artificial natural structures: A study protocol for a randomised controlled trial

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