Table 2.

VP dialogue accuracy

	Prototype	Prototype	Final Application	Final Application
Dialogue type	Typed	Spoken	Typed	Spoken
Students	n = 4	n = 11	n = 56	n = 142
Total questions asked	165	412	1641	4058
Answered correctly, %	55.3	60.4	81.1	85.2
Answered incorrectly, %	12.2	14.3	5.6	4.8
Not answered, %	32.5	25.3	13.3	10