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. Author manuscript; available in PMC: 2011 Dec 2.
Published in final edited form as: Physiol Behav. 2010 Sep 6;101(5):764–769. doi: 10.1016/j.physbeh.2010.08.021

Figure 2. Passive nursing is increased in dams drinking nicotine.

Figure 2

A. A main effect of treatment on the percentage of time spent passive nursing was detected (F(1, 25) = 8.193; p<0.05). Inset: Post-hoc one-way ANOVA on passive nursing data collapsed across days confirmed a significant main effect of treatment on this behavior (F(1, 14) = 4.905; p<0.05). B. No effect of treatment group on questionable arched back nursing was detected (F(1,25) = 0.20; p>0.05). As no effect of time of observation (AM or PM) was detected, data from both AM and PM sessions have been combined. Within-subject analysis indicated a significant increase in questionable arched back nursing across days (Mauchly’s p = 0.12; F(7, 175) = 7.356; p<0.05). C. A main effect of time of observation (AM or PM) was detected on arched back nursing (F(1, 25) = 4.691; p<0.05). No main effect of treatment or interaction was detected (F(1,25) = 0.14; p>0.05). Within-subject analysis indicated a significant effect of day (Mauchly’s p = 0.16; F(7, 175) = 4.709; p<0.05), with significantly less time spent engaged in arched back nursing as the pups grew older. D. Analysis of all nursing behavior subtypes combined indicated no significant differences between treatment groups (F(1,25) = 1.95; p>0.05) but did identify a main effect of time of observation, with significantly more nursing behavior observed in the AM sessions (F(1,25) = 8.365; p<0.05).