The ability to assess how much someone values a particular goal requires integrating information about both the costs of obtaining a goal and the benefit gained by the person seeking it. Even a 10-month-old infant can tell how badly you want something by observing how hard you work to achieve it, says new study that suggests that we learn to infer motivations of others much earlier than previously thought. The study published online in the journal Science also suggests that babies acquire very early an intuition about how people make decisions. “This study is an important step in trying to understand the roots of common-sense understanding of other people’s actions,” said study co-author Josh Tenenbaum, Professor at Massachusetts Institute of Technology (MIT) in the US. “It shows quite strikingly that in some sense, the basic math that is at the heart of how economists think about rational choice is very intuitive to babies who don’t know math, don’t speak, and can barely u...
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