. Author manuscript; available in PMC: 2010 Jun 28.

Published in final edited form as: Behav Pharmacol. 2009 Mar;20(2):174–183. doi: 10.1097/FBP.0b013e32832a8f43

Table 2.

Pooled mean±SEM (τ, in hours) of mice untreated (control), on 0.005% MAP, on 0.010% MAP, and on 0.005% MAP + LiCl

	τ in DD	n	τ in LL	n
Control	23.54 (±0.05)^a	29	26.36 (±0.08)^a	20
0.005% MAP	24.05 (±0.13)^b	29	28.31 (±0.20)^b	21
0.010% MAP	25.09 (±0.55)^c	9	35.09 (±1.53)^c	8
0.005% MAP + LiCl	28.05 (±1.27)^c	14	40.16 (±1.74)^d	8

DD, constant darkness; LiCl, lithium chloride; LL, constant light; MAP, methamphetamine.

Different letters next to treatment groups represent significant differences from other free-running periods in that lighting condition (DD or LL; P< 0.05).