Skip to main content
. Author manuscript; available in PMC: 2018 Aug 1.
Published in final edited form as: Anim Behav. 2017 Jul 22;130:199–207. doi: 10.1016/j.anbehav.2017.06.019

Table 2.

Factors influencing propensity to look up in control trials

Factor Estimate SE Z P
Condition order (control first = reference) −0.212   0.585 −0.362 0.71
Session half (1–2)   0.193   0.449   0.430 0.66
Species (Barbary = reference)   2.515   1.509   1.666 0.10
Age: Barbary −0.113   0.089 −1.272 0.58
Age: Rhesus −0.261   0.126 −2.062 0.14
Sex: Barbary (female = reference)   1.243   0.904   1.376 0.51
Sex: Rhesus (female = reference) −0.577   0.830 −0.695 0.92

Predictors from the full model. Condition order, session half and a random subject factor were included across models. Species and the interactions between species*age and species*sex were added to successive models to test their importance.