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The Halo and Horns Effects [Rating Errors]

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Preamble: We are often unaware of the many biases and prejudices that influence our social judgments. Psychologists call these “bias blind spots.” We can overcome many of these subliminal biases by teaching ourselves to be aware of them. This is the second in a series of articles on the common rating errors. See my earlier article on the recency bias. A 2007 study highlights two of the most common unconscious social judgment biases. Prof. Emily Pronin of Princeton University showed study participants one of two pictures of the same man whom she introduced as an investment broker. One picture showed a suited man with a highly regarded Cornell degree and the other showed the man in casual clothing with a degree from a nondescript college. The professor asked her participants how much of a theoretical $1,000 they would invest in each. The participants rated the suited man as more competent: on average, he got $535 on without having his background checked. In contrast, the causal dresser r

Preamble : We are often unaware of the many biases and prejudices that influence our social judgments. Psychologists call these “bias blind spots.” We can overcome many of these subliminal biases by teaching ourselves to be aware of them. This is the second in a series of articles on the common rating errors. See my earlier article on the recency bias . Unconscious Judgments of an Investment Broker A 2007 study highlights two of the most common unconscious social judgment biases. Prof. Emily Pronin of Princeton University showed study participants one of two pictures of the same ma

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