Table 3 Variance components from partially crossed generalisability study
Component and their interaction | Explanation of interactions | Variance components | % |
|---|---|---|---|
Student | The variance in marks due to true differences in the capability of the student | 17.18 | 11.28 |
Task | The consistent tendency for one task to be marked higher or lower than others | 17.81 | 11.70 |
Assessor | The tendency for one assessor to score a task highly and another to score the same task poorly | 21.13 | 13.88 |
Assessor with student | The varying views that assessors have of students capability | 5.60 | 3.68 |
Assessor with task | The tendency for an assessor to mark a task higher or lower in addition to their usual stringency/leniency | 16.10 | 10.58 |
Student with task | The tendency for the student to engage with one task and not another | 74.42 | 48.88 |
Residual error | Residual variation not explained by other factors | 0.00 | 0.00 |