Studies have shown noticeable positive effects through an increase in positive emotions and a decrease in negative emotions, followed by a reduction in physical pain.
Participants even saw their mood and physiology improve more after transplanting an indoor plant than after performing a task on the computer.
These results indicate that interaction with houseplants can reduce psychological and physiological stress compared to mental tasks.
• Office workers in Norway found a link between the number of plants in their office and the number of sick days and productivity. Those with more plants in their office took less sick days and got more work done.
• American students were asked to perform computer tasks, with or without houseplants, in windowless rooms. In the presence of plants, they were more productive (12% faster in performing tasks) and less stressed since their blood pressure was lower than in the absence of houseplants.
Various studies have shown that patients recovering from surgery, hospitalized in rooms with indoor plants and flowers, had shorter hospital stays, required fewer painkillers, and experienced less pain, anxiety, and fatigue. They had more positive emotions and greater satisfaction with their room, than patients who recovered from their operation in a room without plants.
Students (ages 11–13) participated in a study where they were put in a room with either an artificial plant, a real plant, a photograph of a plant, or no plant at all. During that time, they wore a wireless device for three minutes while exposed to the different stimuli. Children who were put in the presence of a real plant were more attentive and better able to concentrate than those in the other groups. In addition, the presence of a real plant was associated with a better mood in general.
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