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. Author manuscript; available in PMC: 2013 Oct 1.
Published in final edited form as: Behav Brain Res. 2012 Jul 16;234(2):312–322. doi: 10.1016/j.bbr.2012.07.012

Table 2.

This table lists the mean (bold) and standard deviation of the mean (italics) of response-contingent light presentations presented according to a variable-interval 2 min schedule during the test phase of Experiment 2. (Each datum represents the average number of light presentations per session, averaged over two sessions.)

Pre-exposure
Group
Test Phase Blocks
1&2 3&4 5&6 7&8 7&10
Saline
NoLT 7.96 7.96 8.12 8.38 8.88
2.43 2.98 2.95 2.94 2.49
LT 4.54 4.62 4.92 5.19 5.27
3.00 2.71 3.01 2.44 2.96
METH
NoLT 11.75 12.46 11.83 12.29 11.75
2.04 1.54 1.99 1.51 2.97
LT 9.42 10.92 10.58 10.79 11.63
2.95 1.41 2.56 2.28 1.65