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Table 2 Individual variability in behavior by sex and drug exposure (SAL = saline, NIC = nicotine) across the last 10 days of training. The coefficient of variation (see text) was calculated for each animal and averaged across groups for each sign-or goal-tracking behavior (presented as mean ± SEM)

From: Sex differences in nicotine-enhanced Pavlovian conditioned approach in rats

  Lever latencya Lever press Lever probability Receptacle latency Receptacle entries Receptacle probabilityb
SAL Female 26.6 ± 2.9 40.1 ± 10.3 20.0 ± 5.8 34.6 ± 4.7 27.8 ± 3.4 10.3 ± 3.3
NIC Female 28.1 ± 2.2 21.7 ± 2.1 4.6 ± 0.9 30.4 ± 2.2 22.4 ± 2.4 2.4 ± 0.9
SAL Male 17.6 ± 2.2 44.8 ± 8.4 30.2 ± 7.9 29.4 ± 2.9 29.4 ± 2.9 11.1 ± 3.4
NIC Male 26.1 ± 3.6 45.6 ± 15.1 25.7 ± 14.7 29.9 ± 2.6 24.0 ± 4.5 5.0 ± 2.7
  1. aMain effect of sex (p < 0.05), with females more variable than males (collapsed across exposure)
  2. bMain effect of exposure (p < 0.05), with SAL groups more variable than NIC groups (collapsed across sex)