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Table 3 GLMMs of feeding rate, expressed as percentage of the mothers’ feeding rates, as a dependent variable, with (a) and without (b) including the number of processing steps as an independent variable

From: Development of foraging skills in two orangutan populations: needing to learn or needing to grow?

Effect Effect type Estimate Std-Error P-value N (128) AIC
a)
Age Fixed 7.96 0.94 <0.001 cont. 964
sigmoid(Age) Fixed −36.34 56.24 0.52 -
Processing steps Fixed −4.77 1 <0.001 5
Sex (male = 0) Fixed −19.58 10.5 0.062 2
Site (Tuanan = 0) Fixed −120.91 70.31 0.085 2
Age x Sex Fixed 4.94 1.27 <0.001 -
sigmoid(Age) x Site Fixed 126.58 71.67 0.078 -
Individual Random - - - 21
Food Item Random - - - 34
b)
Age Fixed 7.88 0.9 <0.001 cont. 981
sigmoid(Age) Fixed −69.13 55.47 0.212 -
Sex (male) Fixed −21.27 10.09 0.035 2
Site (Tuanan = 0) Fixed −130.81 69.44 0.06 2
Age x Sex Fixed 5.56 1.24 <0.001 -
sigmoid(Age) x Site Fixed 139.4 70.88 0.049 -
Individual Random     21
Food Item Random     34
  1. Shown are effects, estimates, standard errors and p-values as well as number of levels for the categorical variables and AIC values of the models. The number in parentheses represents the total number of individual - age - species combinations
  2. Bold font indicates significance at the 0.05 level