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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 3.

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

Age:
Education:
Sample Size:
Mean:
SD:		 55–74
<16 years
N = 46
M = 80.8
SD = 30.4		 75–98
<16 years
N = 50
M = 109.7
SD = 42.5		 55–74
≥16 years
N = 106
M = 62.7
SD = 20.6		 75–98
≥16 years
N = 67
M = 90.5
SD = 37.1		 Performance Descriptive1
Time score (sec.): <32 <45 <35 <42 Very Superior
(≥98th %ile)
32–40 45–65 35–37 42–50 Superior
(91st – 97th %ile)
41–56 66–77 38–46 51–64 High Average
(75th – 90th %ile)
57–101 78–128 47–75 65–111 Average
(25th – 74th %ile)
102–125 129–190 76–91 112–144 Low Average
(10th – 24th %ile)
126–154 191–205 92–106 145–192 Below Average
(3rd – 9th %ile)
> 154 >205 >106 >192 Impaired
(≤2nd %ile)

Note: M=mean, SD=standard deviation.

1

Based on Wechsler (1997) description system.