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. Author manuscript; available in PMC: 2012 Nov 26.
Published in final edited form as: Dev Psychopathol. 2012 Feb;24(1):157–165. doi: 10.1017/S0954579411000745

Figure 2.

Figure 2

The effects of the rhesus serotonin transporter linked polymorphic region (rh-5-HTTLPR) polymorphism and sex on self-directed behavior (duration of seconds in a 300-s session) during the acute (Ac) and chronic phase (Chr) of four repeated separation stress. Across separations, levels of self-directed behavior were similar in the short-allele carriers and long/long (l/l) allele animals. However, long/short (l/s) allele animals showed lower levels during the first separation (S1; p < .05) but increased as a function of repeated maternal separation (levels during S4 were higher than S1; p < .05), whereas it remained stable in l/l animals during both phases. Bars depict mean ± standard error of the mean, and all post hoc tests were performed using Tukey–Kramer.