Mean Average Precision (MAP)More weight to the top itemsOnly binary relevanceMost standard among the TREC community is MAP which provides a single-figure measure of quality across recall levels.MAP=1∣Q∣∑q=1∣Q∣,APq=1Rq∑k=1nPq(k)⋅relq(k)MAP = \frac{1}{|Q|}\sum_{q=1}^{|Q|}, AP_q = \frac{1}{R_q} \sum_{k=1}^nP_q(k)\cdot rel_q(k)MAP=∣Q∣1∑q=1∣Q∣,APq=Rq1∑k=1nPq(k)⋅relq(k)