Table 2.

Schedule of the user study

Time	Event	Task	Duration
Week 0	Guided Training	1. Annotation guideline review	30 min
		2. Sentence-by-sentence annotation and review using the interface	45 min
	Practice	1. Three quarter-hour sessions of annotation practice	45 min
		2. Four half-hour sections of annotation using Random, with 15-min break between sessions	3 h
Week 1	Annotation warm up training	1. Sentence-by-sentence annotation and review using the interface	15 - 30 min
		2. Two 15 min sessions of annotation practice	30 min
	Main study for method Random	Four 30 min sessions of annotation using Method 2	3 h
		15-min break between sessions
Week 2	Annotation warm up training	1. Sentence-by-sentence annotation and review using the interface	15 - 30 min
		2. Two 15 min sessions of annotation practice	30 min
	Main study for method CAUSE	Four 30 min sessions of annotation using Method 2	3 h
		15-min break between sessions