Table 4.

Errors - number of serious errors, content and formal errors for all 13 questions and difficulty levels

		Errors (multiple answers possible)
		ChatGPT-4			Google Gemini
Question	Difficulty level	Serious errors	Content errors	Formal errors	Serious errors	Content errors	Formal errors	p -value
1	D1	0	1	0	1	2	0	0.9
2		0	0	0	0	1	0	-
3		0	0	0	0	0	0	-
	D1 total	0	1	0	1	3	0	0.9
4	D2	0	2	1	0	0	0	-
5		0	3	1	0	3	0	0.9
6		1	2	2	1	2	0	0.8
7		1	4	0	1	5	0	0.9
8		0	1	0	2	4	0	0.9
	D2 total	2	12	4	4	14	0	0.7
9	D3	0	2	0	1	8	0	0.9
10		0	0	0	1	4	0	-
11		0	3	0	0	4	0	0.9
12		1	3	0	1	2	0	0.9
13		0	1	0	1	3	0	0.9
	D3 total	1	9	0	4	21	0	0.03