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. Author manuscript; available in PMC: 2009 Aug 1.
Published in final edited form as: Drug Alcohol Depend. 2008 Apr 21;96(3):202–212. doi: 10.1016/j.drugalcdep.2008.02.013

Figure 5.

Figure 5

Social reward-CPP obtained using a counterbalanced design shown as time (mean s ± SEM) spent in the playmate-paired side versus alternate side of the apparatus in rats receiving social pairings in either the black (i.e., Paired On Black, n=8) or the white side (i.e., Paired On White, n=8). White and black bars represent the amount of time rats spent in the white and black sides of the apparatus on test day, respectively. Asterisk (*) indicates significantly more time spent in the playmate paired-side relative to the alternate side (p<.05, Wilcoxin signed-ranks test). The dotted line represents 50% of the total test period (i.e., 300 s).