Table 1. Human behaviour associated with each experimental condition.

	Hunter	Gatherer	Researcher
Equipment	2.4 m blowpipe/50 cm dart quiver	None-collecting leaves/seeds from the forest floor and low shrubs while moving	Small notebook/small bag/binoculars/video camera
Noise level	Very quiet/silent	Normal	Normal
Movement	Slow, aiming the blowpipe at them when directly underneath	Moving from plant to plant below the monkeys, stopping to collect.	Moving around below the monkeys, stopping underneath when directly visible.
Gaze direction	Looking up at monkeys	Looking down and ignoring monkeys	Looking up at monkeys