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. Author manuscript; available in PMC: 2015 Feb 1.
Published in final edited form as: Behav Brain Res. 2013 Nov 8;259:10.1016/j.bbr.2013.10.052. doi: 10.1016/j.bbr.2013.10.052

Figure 7. Hole preference and number of nose pokes in three inbred mouse strains.

Figure 7

A) None of the group means reached criterion levels for preference during the first exploration test. B) Holeboard numbering system in the activity chamber. With equal distribution of responses across holes, average values for percent of total nose pokes would equal 6.25% per hole. Criterion for high preference was set at two times the average value (12.5%), and extreme preference was set at three times the average value (18.75%). C) Number of nose pokes during each one-hour test. No olfactory stimuli were presented in the first two tests, given one day apart. Olfactory tests 1 and 2 were conducted before and after a 2-day familiarization with chocolate chips, presented in the home cages. The final olfactory test examined preference for a novel social stimulus (CD-1 male urine). Data shown are means (+SEM). *p<0.05, comparison to C57BL/6J. **p<0.05, comparison to both other strains.