Drawing on philosophy and linguistics, cognitive scientists have begun to see the basic metaphors that we use all the time not just as turns of phrase, but as keys to the structure of thought. By taking these everyday metaphors as literally as possible, psychologists are upending traditional ideas of how we learn, reason, and make sense of the world around us. The result has been a torrent of research testing the links between metaphors and their physical roots, with many of the papers reading as if they were commissioned by Amelia Bedelia, the implacably literal-minded children’s book hero. Researchers have sought to determine whether the temperature of an object in someone’s hands determines how “warm” or “cold” he considers a person he meets, whether the heft of a held object affects how “weighty” people consider topics they are presented with, or whether people think of the powerful as physically more elevated than the less powerful.

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A few psychologists have begun to ponder applications. Ackerman, for example, is looking at the impact of perceptions of hardness on our sense of difficulty. The study is ongoing, but he says he is finding that something as simple as sitting on a hard chair makes people think of a task as harder. If those results hold up, he suggests, it might make sense for future treaty negotiators to take a closer look at everything from the desks to the upholstery of the places where they meet. Nils Jostmann, the lead author of the weight study, suggests that pollsters might want to take his findings to heart: heavier clipboards and heavier pens for issues that they want considered answers for, lighter ones for questions that they want gut reactions on.