Table 2

Median ( mean) [range] for each task variable

Asymptomatic relativesHealthy controls
WCST:
 Number of categories 6 (6.00) 6 (6.00)
 Number of errors 0 (0.41) [0–4] 0 (0.31) [0–3]
 % Perseverative errors 0 (6.49) [0–100] 0 (2.56) [0–100]
SG:
 Number of different sequences18 (18.27) [12–24]18 (17.95) [7–24]
 Novel sequences before repetition 9 (10.32) [2–24]10 (10.03) [2–24]
 % Perseverative errors 0 (5.81) [0–100] 0 (3.68)) [0–100]
BP:
 Number of trigrams correctly recalled
  Control15 (14.90) [12–15]15 (14.95) [14–15]
  Mild interference15 (14.05) [8–15]14 (13.82) [6–15]
  High interference10 (9.46) [1–15] 8 (8.59) [1–15]
 Number of consonants correctly recalled
  Control45 (44.93) [42–45]45 (44.87) [42–45]
  Mild interference45 (43.54) [34–45]44 (42.77) [25–45]
  High interference37 (35.61) [14–45]35 (33.69) [11–45]
MDS:
 Simple movements15 (14.95) [14–15]15 (15.00)
 Dynamic organisation14 (13.78) [11–15]15 (14.49) [12–15]
 Rhythms15 (14.12) [8–15]15 (14.41) [12–15]
WF:
 L Fluency 8 (8.56) [2–16] 9 (10.38) [4–25]
 M Fluency11 (11.98) [6–21]11 (11.49) [6–19]
 Alternate fluency12 (13.27) [9–22]13 (13.38) [8–20]
 % “L” perseverative namings 0 (0.96) [0–14.28] 0 (0.00)
 % “M” perseverative namings 0 (0.64) [0–8.33 0 (0.00
 % Alternate perseverative namings 0 (1.19) [0–8.33] 0 (1.10) [0–2]
VD:
 Time to identify 12 objects27 (28.61) [13–8928 (30.36) [9–75]