TABLE 3.

Comparison of average naturalness scores between presence and absence by semantic subcategory or image property.

	Presence		Absence		P-value
	N	mean (min, max)	N	mean (min, max)
Semantic subcategories
Canopies	76	4.27 (2.73, 4.88)	53	3.95 (2.82, 4.87)	<0.001
Mountains	43	4.49 (3.73, 4.88)	86	3.96 (2.73, 4.87)	<0.001
Bodies of water	66	4.37 (2.89, 4.88)	63	3.90 (2.73, 4.69)	<0.001
Unnatural elements	28	3.76 (2.73, 4.43)	101	4.24 (3.34, 4.88)	<0.001
Image properties
Atmospheric perspectives	25	4.41 (2.89, 4.76)	104	4.08 (2.73, 4.88)	<0.001
Close-range views	25	3.66 (2.89, 4.44)	104	4.25 (2.73, 4.88)	<0.001