SLIDE 1
Purpose: to create a shared meaning
A) formative? B) reliable?
Band descriptors are used to “ensure consistency in grading between one student script and the next, or between different raters.”
(Alexander, Argent & Spenser)
What use are band descriptors? Rob Playfair, IFP Course Tutor, ISLI - - PowerPoint PPT Presentation
What use are band descriptors? Rob Playfair, IFP Course Tutor, ISLI - - PowerPoint PPT Presentation
What use are band descriptors? Rob Playfair, IFP Course Tutor, ISLI Community of Practice 13 th November 2017 Purpose: to create a shared meaning Band descriptors are used to ensure consistency in grading between one student script and the
SLIDE 2
SLIDE 3
Assessing writing
Tacit Knowledge: “We can know more than we can tell.”
(Polanyi)
SLIDE 4
Formative: Shared meaning with students?
Singapore ‘O’ Level descriptor:
- C: ‘simple vocabulary and
idioms mainly correct’
- B: ‘vocabulary wide and
precise enough to convey intended shades of meaning’
- A: ‘vocabulary wide and
precise’
SLIDE 5
Reliable: absolute judgement?
List A
- 1. Stealing a towel from a
hotel.
- 2. Keeping a dime you find on
the ground.
- 3. Poisoning a barking dog.
List B
- 1. Testifying falsely for pay.
- 2. Using guns on striking
workers.
- 3. Poisoning a barking dog.
(Mozer et al.)
SLIDE 6
Reliable: comparative judgement
‘First it does not define quality through prose but through exemplars. Second it does not rely on absolute judgment of tasks, but on comparisons’
(Christodoulou)
SLIDE 7
No More Marking: Which essay is better?
A B 0.85+ inter-rater reliability scores
(No More Marking)
SLIDE 8
So, what use are descriptors?
They can’t…
- help students analyse how
to improve.
- produce reliable summative
scores. Could they…
- provide ceilings for specific
scores?
- explain broadly what is and
what isn’t assessed?
- describe the intended end
goal?
SLIDE 9