Table 3. Descriptive statistics for task 1 objective results where n is the sample size, $\overline{x}$ is the mean, s is the standard deviation, max is the maximum value of the sample and min is the minimum value of the sample.

(*) means significant differences between groups and (a) means significant differences in the post hoc test between the marked groups at the level of significance (α = .05). Differences in totals are due to malfunctions while operating capture software.

Measure	Group	n	$\overline{x}$	s	max	min
Elapsed seconds (*)	ShExML (a)	7	1,560.1429	541.57376	2,192	782
	YARRRML (a)	6	2,443.8333	375.44502	2,896	1,891
	SPARQL-Generate	4	2,292.7500	533.49063	2,769	1,634
	Total	17	2,044.4118	620.68370	2,896	782
Keystrokes	ShExML	6	1,138.50	610.588	2,287	674
	YARRRML	4	1,187	449.649	1,795	810
	SPARQL-Generate	3	1,125.67	121.476	1,265	1,042
	Total	13	1,150.46	457.183	2,287	674
Left button clicks	ShExML	6	176.50	112.169	327	58
	YARRRML	4	318.75	177.989	551	170
	SPARQL-Generate	3	166	78.791	254	102
	Total	13	217.85	138.267	551	58
Right button clicks	ShExML	6	2.17	2.137	6	0
	YARRRML	4	2.25	1.708	4	0
	SPARQL-Generate	2	4.50	2.121	6	3
	Total	12	2.58	2.021	6	0
Mouse wheel scroll	ShExML	6	148	183.737	486	13
	YARRRML	4	679.25	606.711	1,404	101
	SPARQL-Generate	3	199	131.160	348	101
	Total	13	323.23	412.819	1,404	13
Meters travelled by the mouse	ShExML	7	30.400	24.318	70.079	0
	YARRRML	6	43.454	43.144	101.767	0
	SPARQL-Generate	4	21.220	16.526	37.680	0
	Total	17	32.847	30.550	101.767	0
Completeness percentage (*)	ShExML (a)	7	0.771	0.296	1	0.19
	YARRRML	6	0.323	0.366	0.82	0
	SPARQL-Generate (a)	4	0.02	0.04	0.08	0
	Total	17	0.436	0.415	1	0
Precision (*)	ShExML (a)	7	0.495	0.286	1	0.07
	YARRRML	6	0.131	0.160	0.38	0
	SPARQL-Generate (a)	4	0.005	0.01	0.02	0
	Total	17	0.251	0.292	1	0