Managing annotation quality
To ensure high-quality annotations, we need to implement a robust quality assurance process.
Let’s look at some of the approaches to measure annotation quality:
- Inter-annotator agreement: Calculate agreement scores between annotators using metrics such as Cohen’s Kappa. Cohen’s Kappa is a statistical measure that evaluates inter-rater reliability between two annotators by comparing their observed agreement to what would be expected by chance, accounting for the possibility of random agreements and producing a score between
-1
and1
, where1
indicates perfect agreement,0
indicates agreement equivalent to chance, and negative values indicate agreement less than chance.The following code calculates Cohen’s Kappa coefficient to quantify the agreement between two sets of categorical ratings:
from sklearn.metrics import cohen_kappa_score annotator1 = [0, 1, 2, 0, 1] annotator2 = [0, 1, 1, 0, 1] kappa = cohen_kappa_score(annotator1...