G coefficient estimates to maximise scale reliability for future studies (doctors, pharmacists and nurses)
| No of judges | G coefficient |
| ρ | |
| 1 | 0.76 |
| 2 | 0.85* |
| 3 | 0.89 |
| 4 | 0.91 |
| 5 | 0.92 |
| 6 | 0.93 |
| 9 | 0.95 |
| 12 | 0.96 |
| 15 | 0.96 |
| 18 | 0.96 |
| 21 | 0.97 |
Source: Assunção-Costa, 2022.
(ρ): letter phi has more contributions to the variance. It is a more conservative coefficient representing, therefore, how generalisable the instrument is to different samples in other contexts.
*A generalisability coefficient greater than 0.8 was considered to represent acceptable reliability.