Table 10.

Original data of the studies examining the influence of indoor plants on EEG α waves.

Study	Study Design	Appraisal Quality	Without Plant			With Plant
			n	Mean	SD	n	Mean	SD
[72]	Experiment (non-RCT)	Moderate	38	0.130	0.210	38	0.090	0.170
[81]	Experiment (RCT)	Moderate	17	0.043	0.020	17	0.112	0.027
[56]	Field quasi- experiment (non-RCT)	Moderate	30	0.160	0.054	60	0.210	0.054