Retrieval & Search
Normalized Discounted Cumulative Gain
A ranking-quality measure that discounts relevance at lower positions, then divides by the score of the best ordering of the same judged candidates. Its abbreviation is NDCG. The gain formula, cutoff, relevance labels and tie treatment must be specified before comparing results.
Reviewed
Sources
Member lesson
The definition and sources are public. The complete practical lesson is for members.