Hi,
Normalized Discounted Cumulative Gain (NDCG) allows each retrieved document to have a graded relevance for performance calculations. Someone told me that it usually assigns relevance grades from 0 to 3 or sometimes from 0 to 5. But, for my problem, I defined graded relevance from 0 (not relevant) to 10 (with highest relevance) sequentially. Also, I did not notice limitations of NDCG for using it graded relevance beyond 3 or 5. Is it alright to use relevance grades from 0 to 10 for NDCG or DCG calculations?
I highly appreciate your response.