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. Author manuscript; available in PMC: 2010 Dec 1.
Published in final edited form as: Neuropharmacology. 2009 Aug 22;57(7-8):665–672. doi: 10.1016/j.neuropharm.2009.08.007

Table 3.

Mean trial initiation latency, mean pellet retrieval time and the number of premature responses per trial in rats repeatedly treated with MPH (n=17) or SAL (n=12) following an acute challenge administration of mph (0.33 mg/kg) or sal (1ml/kg). Acute treatments were delivered 30 min prior to testing .Data are expressed as mean ± sem

Group Acute challenge Mean Trial Initiation Latency (s) Mean Pellet Retrieval Time (s) Tot Premature/Tot Trials
Retention Reversal
SAL sal 3.39 ±0.36 3.15 ±0.37 1.27 ±0.04 0.85 ±0.19
mph 4.10 ±0.39** 4.58 ±0.33** 1.30 ±0.04 0.81 ±0.16
MPH sal 2.99 ±0.35 3.11 ±0.38 1.26 ±0.03 0.79 ±0.09
mph 3.91 ±0.42* 4.20 ±0.43** 1.30 ±0.04** 0.66 ±0.09
*

p≤0.05

**

p≤0.01: significant difference between sal and mph.