April 25, 2012, 6:05 p.m. ET
Psychology and Its Discontents
We see an area in the brain 'light up' when we think about a topic, and assume we know something about thought. But what, exactly?"If we can find which area of the brain lights up when we think about love or chocolate or politics, we assume we know something. But what, exactly, do we know? Sometimes less than we think. "An adolescent's feeling of shame because a parent is uneducated, unemployed, and alcoholic," Mr. Kagan writes, "cannot be translated into words or phrases that name only the properties of genes, proteins, neurons, neurotransmitters, hormones, receptors, and circuits without losing a substantial amount of meaning"—and meaning is as fundamental to psychology as genes are to biology. Many psychological concepts, he notes, including fear, self-regulation, well-being and agreeableness, are studied without regard to the context in which they occur—with the resulting implication that they mean the same thing across time, cultures and content. They do not."
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