Table A3.
Outputs from the model 2 analysis
| Model | Variable | df | χ2 | P |
|---|---|---|---|---|
| Full model | Competitive play duration | 1 | 0.48 | 0.49 |
| Relaxed play duration | 1 | 9.38 | 0.002 | |
| Age combination | 1 | 0.75 | 0.39 | |
| Sex combination | 2 | 1.10 | 0.58 | |
| Kin relationship | 1 | 1.20 | 0.27 | |
| Competitive play duration*pack type | 1 | 1.83 | 0.18 | |
| Relaxed play duration*pack type | 1 | 5.02 | 0.025 | |
| Pack type | 1 | 2.00 | 0.16 | |
| Pack type: ‘puppy’ | Relaxed play duration | 1 | 3.21 | 0.07 |
| Pack type: ‘mixed-age’ | Relaxed play duration | 1 | 9.03 | 0.003 |
Generalized mixed-effect model (GLMM) with a Poisson distribution, with the ‘frequency of affiliative behaviours’ as the response variable (normalized by observation time by including the offset function in the model formula), and ‘competitive play duration’, ‘relaxed play duration’, ‘age combination’ (e.g. ‘puppy–puppy’ versus ‘puppy–adult’ dyads), ‘sex combination’ (‘male–male’, ‘male–female’, ‘female–female’ dyads) and ‘kin relationship’ (‘kin’ versus ‘nonkin’ dyads) as predictor variables. The interactions between both competitive and relaxed play durations and ‘pack type’ were included. Statistics are given for each variable when they were last in the model.