| Integrated diagnostic scale | Reflective analytic scales | Function-specific scales | Task-specific scales |
---|---|---|---|---|
Main objective | External evaluation & assessment | Reflection | Reflection | Lesson analysis |
High Reliability | Required | Desirable | Desirable | Desirable |
Users | Other assessors | The teacher who conducted the lesson | The teacher who conducted the lesson | Other assessors |
Unit of evaluation/analysis | Entire lesson | Entire lesson | Language function | Task (selected by teacher) |
Based on lesson observation? | YES | NO | NO (Possible) | YES |