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. Author manuscript; available in PMC: 2015 Nov 1.
Published in final edited form as: Alzheimers Dement. 2014 Mar 20;10(6):675–683. doi: 10.1016/j.jalz.2013.11.007

Table 2.

Conversion of subtest raw scores to new scores based on percentile rank

Test Subtest raw score Percentiles New score Descriptor
Logical Memory I 0–3 0–2 0 Impaired
4–6 3–8 1 Borderline
7–9 9–24 2 Low average
10–12 25–50 3 Average −
13–15 51–75 4 Average +
16–17 76–91 5 High average
18+ 92+ 6 Superior
Logical Memory II 0–2 0–2 0 Impaired
3–5 3–8 1 Borderline
6–8 9–24 2 Low average
9–11 25–50 3 Average −
12–13 51–75 4 Average +
14–16 76–91 5 High average
17+ 92+ 6 Superior
Logical Memory Retention 0.0–0.39 0–2 0 Impaired
0.4–0.57 3–8 1 Borderline
0.58–0.76 9–24 2 Low average
0.77–0.90 25–50 3 Average −
0.91–1.00 51–75 4 Average +
1.10–1.12 76–91 5 High average
1.13+ 92+ 6 Superior
Animals 0–8 0–2 0 Impaired
9–13 3–8 1 Borderline
14–15 9–24 2 Low average
16–19 25–50 3 Average −
20–23 51–75 4 Average +
24–27 76–91 5 High average
28+ 92+ 6 Superior
Vegetables 0–7 0–2 0 Impaired
8–9 3–8 1 Borderline
10–12 9–24 2 Low average
13–14 25–50 3 Average −
15–18 51–75 4 Average +
19–20 76–91 5 High average
21+ 92+ 6 Superior
Boston 0–20 0–2 0 Impaired
21–23 3–8 1 Borderline
24–25 9–24 2 Low average
26–28 25–50 3 Average −
29 51–75 4 Average +
30 76–91 5 High average
Digit Span Backward 0–3 0–2 0 Impaired
4 3–8 1 Borderline
5 9–24 2 Low average
6–7 25–50 3 Average −
8 51–75 4 Average +
9–10 76–91 5 High average
11+ 92+ 6 Superior
Digit Span Forward 0–5 0–2 0 Impaired
6 3–8 1 Borderline
7 9–24 2 Low average
8–10 25–50 3 Average −
11 51–75 4 Average +
12 76–91 5 High average
Digit Symbol 0–22 0–2 0 Impaired
23–28 3–8 1 Borderline
29–35 9–24 2 Low average
36–45 25–50 3 Average −
46–52 51–75 4 Average +
53–61 76–91 5 High average
62+ 92+ 6 Superior
Trails A 102+ 0–2 0 Impaired
101–69 3–8 1 Borderline
68–50 9–24 2 Low average
49–39 25–50 3 Average −
38–31 51–75 4 Average +
30–25 76–91 5 High average
>25 92+ 6 Superior
Trails B 274+ 0–2 0 Impaired
273–171 3–8 1 Borderline
170–112 9–24 2 Low average
111–88 25–50 3 Average −
87–66 51–75 4 Average +
65–53 76–91 5 High average
>53 92+ 6 Superior
Trails Difference 171+ 0–2 0 Impaired
170–126 3–8 1 Borderline
125–69 9–24 2 Low average
68–47 25–50 3 Average −
46–32 51–75 4 Average +
31–18 76–91 5 High average
<18 92+ 6 Superior