Table 5.
The Distributional and Scale Characteristics of the TSQM
| Scale Mean (SD) | Cronbach's Alpha | % Scores at Scale Ceiling | Skewness** | |||||
| TSQM Scales | VAS Method (n = 287) | Likert Method (n = 280) | VAS Method | Likert Method | VAS Method | Likert Method | VAS Method | Likert Method |
| Effectiveness | 69.7 (21.8) | 68.6 (20.4) | .87 | .88 | 13.0% | 8.9% | -.47 | -.76 |
| Side effects | 84.3 (19.2) | 83.7 (19.5) | .84 | .88 | 44.3% | 41.1% | -1.1 | -1.2 |
| Convenience | 84.9 (19.7) | 83.2 (18.7) | .86 | .90 | 44.9% | 36.8% | -1.3 | -1.1 |
| Global Satisfaction | 78.0 (20.4) | 71.1 (22.6) | .80 | .86 | 25.1% | 12.9% | -.81 | -.97 |
** Skewness Standard Error VAS Method = .14, Likert-type Method = .15