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Table 1 Performance results.

From: Effects of methylphenidate on motor system excitability in a response inhibition task

 

Placebo

Mean ± SD

MPH

Mean ± SD

ANOVAs (significant results)

Hit rate (in %)

98.1 ± 1.8

98.6 ± 1.5

 

Impulsivity errors

1.07 ± 1.14

0.57 ± 0.65

Med: F(1,12) = 3.27; p < 0.1

Mean reaction time

   

   left hand (in ms)

335.3 ± 16.5

327.4 ± 16.2

Med: F(1,12) = 4.71; p < 0.05

Med × Order: F(1,12) = 10.43; p < 0.01

   right hand (in ms)

320.2 ± 15.0

313.4 ± 15.9

Side: F(1,12) = 27.26; p < 0.001

Reaction time – standard deviation

   

   left hand (in ms)

39.3 ± 6.5

36.1 ± 7.2

 

   right hand (in ms)

38.8 ± 5.8

37.6 ± 10.0

 
  1. Hit rate, impulsivity errors and reaction times were examined.
  2. Factors in the ANOVAs were type of medication (placebo vs. MPH, 'Med'), the order of medication (MPH at the first vs. the second testing, 'Order') and the reacting hand ('Side').