Recent large scale studies of normative Trails A and B performance.

Data are ordered by Trails A completion times. SD = standard deviation. Age-slope = increase in completion times in s/year, estimated from available data. B-A = difference between Trails B and Trails A completion times. Recent large scale studies of normative Trails A and B performance.数据按连线测验A（Trails A）的完成时长排序。SD为标准差（standard deviation）。年龄斜率（age-slope）指基于现有数据估算得到的完成时长年增幅，单位为秒/年。B-A为连线测验B（Trails B）与连线测验A（Trails A）的完成时长差值。近期已有针对连线测验A与B常模性能的大规模研究。