Table 2

Go/Nogo-Task Performance (Boys only)

Measure
Healthy
Comparison
N = 15
Tourette
Syndrome
N = 20
repeated measure ANOVA
(Sidak-adjusted Post-hoc tests)a

Mean (SD)
Mean (SD)


Success rate (%)b


Letter: F(2,66) = 247.3**, (X > B**, A > B**)
     Go (X)c
98 (1.8)
97 (2.1)

     Go (A)d
98 (2.1)
98 (2.4)

     Nogo (B)e
61 (17.1)
60 (11.7)

Reaction time of correct
responses (ms)b


Letter: F(1,33) = 66.8**, (A > X**)
     Go (X)
401 (106)
378 (44)

     Go (A)
438 (106)
403 (59)

Reaction-time of errors compared to correct
Go (A) (ms)f


Letter: F(1,33) = 10.8**, (A > B**)
     Correct Go (A)
434 (106)
404 (59)

     Error in Nogo (B)
372 (203)
347 (87)

Reaction-time variability (ms)


Letter: F(1,33) = 13.2**, (A > B**)
     Go (X)
109 (34)
118 (35)
Run*Group: F(2,66) = 2.8+
     Go (A)
137 (39)
133 (49)
Run*Letter: F(2,66) = 3.2*

a only effects with p < .10 are reported

b marginal means across runs and standard deviations of factor "Group"

c Go (X) was frequent (4/6 of all trials)

d Go (A) was infrequent (1/6 of all trials)

e Nogo (B) was infrequent (1/6 of all trials)

f reaction-times of all three runs collapsed into a grand mean, thus slight differences to the marginal means reported for analysis of 'Reaction time of correct responses (ms)' emerge.

+ p < .1

** p < .01

Roessner et al. Behavioral and Brain Functions 2008 4:29   doi:10.1186/1744-9081-4-29