Table 6.
Correlation coefficients between rating systems available in app stores and MARS star rating, total and subjective quality scores, by number of ratings cut-off and rater
| MARS item/scale | N of apps (%) | N of ratings cut-off | Rater 1 | Rater 2 | ||
|---|---|---|---|---|---|---|
| Estimate | p | Estimate | p | |||
| MARS star rating (N23)a | 37 (86.0) | 1 | .18 | .28 | .26 | .12 |
| 31 (72.1) | 5 | .25 | .17 | .31 | .086 | |
| 23 (53.5) | 10 | .50 | .015 | .46 | .028 | |
| MARS total scoreb | 37 (86.0) | 1 | .02 | .92 | .09 | .62 |
| 31 (72.1) | 5 | .03 | .89 | .09 | .62 | |
| 23 (53.5) | 10 | .43 | .041 | .37 | .081 | |
| App subjective qualityb | 37 (86.0) | 1 | .16 | .35 | .20 | .23 |
| 31 (72.1) | 5 | .19 | .30 | .26 | .16 | |
| 23 (53.5) | 10 | .50 | .015 | .54 | .008 | |
a Spearman’s ρ correlation coefficient; b Pearson’s r correlation coefficient