16. A non-transitory computer-readable storage medium including instructions that, when executed by at least one processor of a computing system, cause the computing system to perform a method comprising: calculating raw scores for a plurality of media items based on a classifier model and a target concept; ranking the plurality of media items based on the raw scores; determining a review set of the plurality of media items, the review set comprising a subset of the plurality of media items; associating each of the media items of the review set with a content depiction determination, wherein the content depiction determination is indicative of whether a media item depicts the target concept; and calculating a normalized score formula based on the raw scores and the content depiction determinations for the media items of the review set.
16. A non-transitory computer-readable storage medium including instructions that, when executed by at least one processor of a computing system, cause the computing system to perform a method comprising: calculating raw scores for a plurality of media items based on a classifier model and a target concept; ranking the plurality of media items based on the raw scores; determining a review set of the plurality of media items, the review set comprising a subset of the plurality of media items; associating each of the media items of the review set with a content depiction determination, wherein the content depiction determination is indicative of whether a media item depicts the target concept; and calculating a normalized score formula based on the raw scores and the content depiction determinations for the media items of the review set. 17. The non-transitory computer-readable storage medium of claim 16 , wherein the review set is determined based on a sampling rate.