Table 4.

Effects of success, condition, age and trial number on proportion of food-directed behaviours

Term	Estimate	SE	Lower CI	Upper CI	Chisq	df	p value
Intercept	− 2.372	0.362	− 3.169	− 1.696
Success	1.882	0.520	0.889	2.947			1
Condition (conspecific)	0.385	0.369	− 0.253	1.127			1
Condition (human)	0.608	0.388	− 0.167	1.411			1
Age2	− 0.362	0.124	− 0.611	− 0.106	7.016	1	0.008
Trial	0.065	0.120	− 0.169	0.296	0.297	1	0.586
Condition (conspecific) x Success	− 0.804	0.639	− 2.047	0.405
Condition (human) x Success3	-2.154	0.665	− 3.540	− 0.907	9.800	2	0.007

¹not shown due to limited interpretability

²age was z-transformed to a mean of 0 and a standard deviation of 1. Original variable: 2–18 yrs

³the overall effect of the interaction is reported