Table 4.

Concurrent validity of total score measured with the Pearson correlation coefficient.

Scale	Pearson r	95% CI	P value
Total score vs subjective quality	0.85	0.79-0.90	<.001
Total score vs star rating (item 23)	0.84	0.77-0.89	<.001
Total score vs star rating (app stores)	0.24	0.03-0.42	.02