Table 2.
Female evictions. (Model performance in predicting the probability of an eviction event occurring during a breeding attempt (N = 415 breeding attempts in 15 groups). Analysis using the female reproductive success (CS) measure of helping performance under the coercion of cooperation hypothesis. Models comprise the top model set where ΔAIC ≤ 6. Hyp., hypothesis; A, adaptive forced dispersal; R, reproductive competition. Columns 2–8 show parameter effect sizes from GLMMs on the logit scale: Int., Intercept; B, number of breeding females; E, mean rainfall in previous six months; R, mean group relatedness; symbol ‘:’, interaction; k, number of estimated parameters including a random intercept for group ID; logLik, log-likelihood; AIC, Akaike's information criterion; ΔAIC, change in AIC value from the best performing model; wi, Akaike's model weight; retained, ticks indicate that the model was retained after applying the nesting rule of [62]; Adj. wi, adjusted Akaike's model weight for the retained models. Blank cells indicate that the term was absent from that model.)
| Hyp. | Int. | B | E | R | B : E | R : B | R : E | k | logLik | AIC | ΔAIC | wi | retained | Adj. wi |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| R | −5.44 | 0.37 | 3 | −108.63 | 223.26 | 0.00 | 0.34 | ✓ | 1.00 | |||||
| A | −3.34 | 0.11 | −14.46 | 1.76 | 5 | −107.25 | 224.50 | 1.24 | 0.18 | |||||
| A/R | −5.49 | 0.37 | 0.42 | 4 | −108.62 | 225.25 | 1.99 | 0.13 | ||||||
| R | −5.45 | 0.37 | 0 | 4 | −108.63 | 225.26 | 2.00 | 0.13 | ||||||
| A | −3.29 | 0.11 | 0 | −14.52 | 1.77 | 6 | −107.25 | 226.50 | 3.24 | 0.07 | ||||
| A/R | −5.51 | 0.37 | 0 | 0.43 | 5 | −108.62 | 227.24 | 3.99 | 0.05 | |||||
| R | −5.37 | 0.36 | 0 | 0 | 5 | −108.63 | 227.26 | 4.00 | 0.05 | |||||
| A | −3.34 | 0.11 | 0 | −14.11 | 1.77 | −0.01 | 7 | −107.25 | 228.49 | 5.23 | 0.02 | |||
| A | −5.25 | 0.37 | 0 | −1.44 | 0.03 | 6 | −108.60 | 229.21 | 5.95 | 0.02 | ||||
| R | −5.42 | 0.36 | 0 | 0.44 | 0 | 6 | −108.62 | 229.24 | 5.98 | 0.02 |