Table 3.
Summary of the factor extraction measures used in exploratory factor analysis of the Athens Insomnia Scale (AIS) scores in Indian computer professionals.
| Number of Factors | Eigenvalue | Cumulative Variance Explained (%) | Above Point of Inflection on Scree Plot | Decision to Extract | ||
|---|---|---|---|---|---|---|
| Kaiser’s Criteria (Eigenvalue ≥ 1) | Cumulative Variance Rule (>40%) | Scree Test | ||||
| 1 | 2.69 | 33.65 | Yes | √ | √ | √ |
| 2 | 1.17 | 48.28 | Yes | √ | √ | √ |
| 3 | 1.01 | 60.90 | Yes | √ | Χ | √ |
| 4 | 0.83 | 71.30 | No | Χ | Χ | Χ |
√ indicates extraction criteria fulfilled, Χ indicates otherwise.