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. Author manuscript; available in PMC: 2009 Jun 8.
Published in final edited form as: Arch Clin Neuropsychol. 2008 Feb 21;23(2):129–137. doi: 10.1016/j.acn.2007.11.005

Table 2.

Normative (Control) Data for Time to Completion for Trail Making Test Part A, in Seconds, by Age and Education

Age:
Education:
Sample Size:
Mean:
SD:		 55–74
<16 Years
N = 46
M = 33.2
SD = 13.1		 75–98
<16 Years
N = 50
M = 44.8
SD = 13.4		 55–74
≥16 Years
N = 106
M = 29.7
SD = 7.8		 75–98
≥16 Years
N = 67
M = 40.3
SD = 13.2		 Performance Descriptive1
Time score (sec.): <15 <25 <17 <21 Very Superior
(≥98th %ile)
15–17 25–28 17–21 21–27 Superior
(91st – 97th %ile)
18–24 29–33 22–23 28–30 High Average
(75th – 90th %ile)
25–42 34–51 24–34 31–46 Average
(25th – 74th %ile)
43–51 52–64 35–40 47–57 Low Average
(9th – 24th %ile)
52–74 65–78 41–48 58–80 Borderline
(3rd – 8th %ile)
>74 >78 >48 >80 Extremely Low
(≤2nd %ile)

Note: M=mean, SD=standard deviation.

1

Based on Wechsler (1997) description system.