Table 2. The hygienist’s concentration prediction before and after training session.

Raters	Factory Unit	Mean (SD)		p-value
		Before	After
Non-experienced	Crushing	11.10 (2.22)	13.79 (4.40)	0.080
	Ball mill	7.06 (2.41)	7.44 (1.72)	0.068
	Press	5.00 (1.20)	7.25 (1.49)	0.216
	Coating preparation	5.59 (1.74)	6.44 (1.76)	0.273
	Coating line	3.28 (0.92)	4.41 (1.36)	0.461
	Furnace	3.16 (0.9)	4.34 (0.81)	0.225
	Packing	2.34 (0.83)	2.88 (0.74)	0.465
Experienced	Crushing	11.70 (5.97)	21.20 (7.92)	0.075
	Ball mill	7.50 (4.57)	11.00 (3.81)	0.522
	Press	4.30 (1.86)	6.10 (2.41)	0.011
	Coating preparation	4.60 (4.83)	5.90 (3.29)	0.088
	Coating line	2.30 (1.89)	2.60 (1.64)	0.028
	Furnace	2.04 (1.39)	3.30 (1.60)	0.017
	Packing	2.46 (2.64)	3.74 (2.82)	0.016