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. 2018 Jul;141:137–150. doi: 10.1016/j.anbehav.2018.04.017

Table A4.

Outputs from the model 3 analysis

Variable df χ2 P
Frequency of competitive play behaviours 1 7.82 0.005
Age of the actor 1 85.10 < 2.2e-16
Sex of the actor 1 7.47 0.006
Age of the receiver 1 4.93 0.026
Sex of the receiver 1 0.40 0.52
Kin relationship 1 2.85 0.09

Generalized mixed-effect model (GLMM) with a Poisson distribution, with the ‘frequency of rank indicator behaviours’ (normalized by observation time by including the offset function in the model formula) as the response variable and the ‘frequency of competitive play behaviours’ (normalized by observation time), ‘age’ and ‘sex’ of both actors and receivers and ‘kin relationship’ as predictor variables. Statistics are given for each variable when they were last in the model.