Sentence examples for barter interaction from inspiring English sources
For a barter interaction, the experimenter's left hand was held outstretched, palm up, with the finger tips within a few inches of the caging.
For each barter interaction, the experimenter held up a piece of exchange food in the right hand and held out the left hand in a stereoypted "begging gesture," hand outstretched with fingers near the mesh.
Chimpanzees (Pan troglodytes) are an interesting test case as they are an intelligent species, closely related to humans, and known to participate in reciprocal interactions and token economies with humans, yet they have not spontaneously developed costly barter.
A simple reciprocal experimental paradigm which prevented direct physical interaction between participants failed to elicit chimpanzees' other-regarding preferences, reciprocal cooperation [22] and spontaneous barter [44].
Cash has replaced barter.
Ron Haugen likes to barter.
The first step was barter.
