Table 2 Results of principal component analysis of the standardized residuals, separation and reliability values of persons and items
Subscales | Raw variance explained by measure (%) | Unexplained variance | Separation index | Reliability | ||||
|---|---|---|---|---|---|---|---|---|
Total | 1st contrast | 2st contrast | Persons | Items | Persons | Items | ||
Speaking anxiety | 15.3 (65.7%) | 8.0 (34.3%) | 1.6 (6.7%) | 1.4 (6.0%) | 2.20 | 12.23 | 0.83 | 0.99 |
Writing anxiety | 9.80 (55.2%) | 8.0 (44.8%) | 1.6 (8.7%) | 1.3 (7.5%) | 1.98 | 8.25 | 0.80 | 0.99 |
Reading anxiety | 11.1 (58.2%) | 8.0 (41.8%) | 1.9 (10.0%) | 1.4 (7.3%) | 2.19 | 8.07 | 0.83 | 0.98 |
Listening anxiety | 13.6 (63.0%) | 8.0 (37.0%) | 1.6 (7.4%) | 1.3 (6.0%) | 2.07 | 8.95 | 0.81 | 0.99 |
Total score | 22.0 (40.7%) | 32.0 (59.3%) | 3.6 (6.7%) | 3.1 (5.8%) | 3.01 | 12.79 | 0.90 | 0.99 |