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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').