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. Author manuscript; available in PMC: 2013 Jul 11.
Published in final edited form as: Psychopharmacology (Berl). 2009 Jan 14;204(2):213–225. doi: 10.1007/s00213-008-1451-x

Figure 1.

Figure 1

Spatial confinement (upper axes) and intensification of spatial confinement for the 5th amphetamine (5.0 mg/kg) injection compared to the 1st. These data are for the 1st hr of the sessions. Vertical brackets show +/− 1 SEM, while horizontal brackets and double asterisks indicate significant (p<.01, paired t-tests) differences between 1st and 5th injections.