Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Cumulative success functions illustrating the effect of methylphenidate on performance over the time course of the session for subject Shepard. The two 3 mg/kg and the 6 mg/kg methylphenidate sessions and their corresponding controls are plotted from one representative subject. Task performance improved at 3 mg/kg methylphenidate and deteriorated at 6 mg/kg methylphenidate, whereas the length of the experimental session was significantly increased.
