Correlation of four usability survey subscales.

Table 3: Correlation of four usability survey subscales.

Correlation		Efficiency	Learnability	User experience	Perceived control
Efficiency	Correlation coefficient		0.728^**	0.598^**	0.552^**
	Sig. (two-tailed)		0	0.001	0.002
	N		29	29	29
Learnability	Correlation coefficient	0.728^**		0.737^**	0.549^**
	Sig. (two-tailed)	0		0	0.002
	N	29		29	29
User experience	Correlation coefficient	0.598^**	0.737^**		0.549^**
	Sig. (two-tailed)	0.001	0		0.002
	N	29	29		29
Perceived control	Correlation coefficient	0.552^**	0.549^**	0.549^**
	Sig. (two-tailed)	0.002	0.002	0.002
	N	29	29	29

^**Correlation is significant at the 0.01 level (2-tailed).