This brings us to precision; precision is how much of a volume was added correctly. For example if Player A has a precision 0.9221 that means about 92% of what Player A added was correct and about 8% of what Player A added should not have been added. To determine a player’s precision we use their true positive (tp) results, correctly added, and their false positive (fp) results, incorrectly added, in this formula: [[File:Precisionformula.png|center]]
再次说明,准确度是单位体积里正确片段的个数。比如某玩家的准确度是0.9221,那92%片段正确添加,8%片段错误添加。正确添加的片段也就是真阳性,记为 tp ;相应有 fp .则可以用如下公式计算准确度: