An optimal range of information quantity on computer-based procedure interface design in the advanced main control room

Figures & data

Table 1. Different information quantity of CBP interfaces.

Presentation		Quantification of
style	Events	information (bits)
High	At least 10	At least 3.32
Medium	4–8	2–3
Low	1 or 2	0 or 1

Figure 1. The layout of presentation style used in this experiment. (A) High information quantity; (B) low information quantity; and (C) medium information quantity.

Table 2. The difference between complex and simple task.

	Complex task	Simple task
Main step	9	5
Number of	100	50
parameters
Requirements of	27	13
determination

Figure 2. Interface of the experiment platform (information quantity: medium; task: complex).

Table 3. The MANOVA results of this experiment.

Source	Wilks’ λ	P-value
Information quantity	0.229	< 0.001
Task complexity	0.384	< 0.001
Information quantity	0.902	0.351
× task complexity

Table 4. The results of post hoc test for each dependent variable.

DVs	Levels of information quantity		Standard error	P-value
Operation time	High	Low	763.97993	<0.001
		Medium	763.97993	0.491
	Low	High	763.97993	<0.001
		Medium	763.97993	<0.001
	Medium	High	763.97993	0.491
		Low	763.97993	<0.001
Mental workload	High	Low	2.65168	0.905
		Medium	2.65168	<0.001
	Low	High	2.65168	0.905
		Medium	2.65168	<0.001
	Medium	High	2.65168	<0.001
		Low	2.65168	<0.001
Secondary task performance	High	Low	23.97886	0.014
		Medium	23.97886	<0.001
	Low	High	23.97886	0.014
		Medium	23.97886	0.018
	Medium	High	23.97886	<0.001
		Low	23.97886	0.018

Figure 3. The interval plot for operation time.

Figure 4. The integrated results of workload and secondary task performance.

Figure 5. The inverted-U relationship between information quantity and performance.

Table 5. T-test result of separate operation time.

Source	T-value	P-value
4 vs. 5	44.26	0.014
5 vs. 6	1.72	0.335
5 vs. 7	3.95	0.158
5 vs. 8	10.63	0.093

Figure 6. The separate operation time of medium quantification of information.