Research Article
Improvement of Open Source Software Usability: An Empirical Evaluation from Developers' Perspective
Table 1
Coefficient alpha and principal component analysis (PCA) of variables.
| Usability factors | Item no. | Coefficient α | PCA eigen value |
| Users requirements | 1–4 | 0.67 | 2.19 | Usability experts opinion | 5–8 | 0.64 | 1.22 | Incremental design approach | 9–12 | 0.55 | 1.08 | Usability testing | 13–16 | 0.55 | 0.99 | Knowledge of UCD methods | 17–20 | 0.59 | 1.05 |
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