Attention is our currency, and it’s precious. William James, the philosopher, pioneering experimental psychologist and brother of Henry James, devoted an entire chapter of his classic The Principles of Psychology to attention, published in 1890. In it, he writes, “Every one knows what attention is. It is the taking possession by the mind. . . .” and “My experience is what I agree to attend to . . . Without selective interest, experience is an utter chaos.” Notably, James divided attention into two basic types that continue to define the way we think about it: voluntary, active attention (such
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