“The goal was to create a normal conversation with accompanying movements to see what the mind would intuitively(直觉地)collect about the trustworthiness of another，”said DeSteno.

　　The participants then play an economic game called “Give Some”，which asks them to determine how much money Nexi might give them at the expense of her individual profit. Meanwhile，they decide how much，if any，they'll give to Nexi. The rules of the game allow for two distinct outcomes：higher individual profit for one and loss for the other，or relatively smaller and equal profits for both partners.

　　“Trust mightn't be determined by only one gesture，but rather a ‘dance’ that happens between the strangers，which leads them to trust or not trust the other，” said DeSteno，who will continue testing their theories by seeing if Nexi can be taught to predict the trustworthiness of human partners.

　　20．How many fields does the research involve?

　　A．Two fields.

　　B．Three fields.

　　C．Four fields.

　　D．Five fields.

　　21．According to the text, the researchers focused on ________.

　　A．the writing communication

　　B．the voice communication

　　C．the gesturebased communication

　　D．the online communication

　　22．According to the text, the first part of the experiment is to ________.

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