Cognitive biases are psychological phenomena that distort our perceptions, memory, or judgment. When success depends on accurate perception, evaluation, or recollection of what's around us, distortions can lead to erroneous results that range from harmless to catastrophic.
The Halo Effect (or Halo Error) was first identified in 1920 by Edward Thorndike, who was studying how military officers evaluated their subordinates. [Thorndike 1920] He found that high ratings in one attribute tended to be correlated with high ratings in other seemingly unrelated attributes. But the effect is universal, extending beyond military performance evaluation. In modern experiments, for example, researchers have demonstrated that people tend to judge physically attractive people as possessing more socially desirable personality traits than do less physically attractive people. Thus, physical traits bias our assessment of personality traits.
In the context of performance reviews, researchers have demonstrated that when evaluators perceive in subordinates attributes that they regard as negative, those evaluators tend to assess more negatively the unrelated attributes of those subordinates. This effect is known as the Horn Effect.
The Halo Effect is pervasive. Here are three examples of how it can affect organizational decision making.
- Status affects persuasiveness
- Assessments of the validity of someone's assertions can be affected by our perception of her or his status. For instance, when supervisors attend meetings of their subordinates, their statements tend to have greater weight than they deserve. And when pariahs speak, listeners are more likely to discount what is said than when superstars deliver essentially the same message.
- The effects of status are wide-ranging. For instance, someone mentored by a high-status individual can acquire some of the elevated status of the mentor. See "Dispersed Teams and Latent Communications," Point Lookout for September 3, 2003, for more.
- Falsifying an argument falsifies the assertion
- When we assess the truth of an assertion, we examine the argument that justifies it. In the course of that examination, if we find a flaw in the argument, we sometimes conclude that the assertion is false. The assertion might indeed be false, but finding a flaw in a supposed proof of the assertion doesn't prove that the assertion is false.
- This error is a rhetorical fallacy known as argumentum ad logicam, the fallacy fallacy, or the fallacist's fallacy. It's a manifestation of the halo effect in the realm of logic.
- Hat hanging
- Hat hanging is a phenomenon identified by Virginia Satir, a pioneer family therapist. When pariahs speak, listeners are
more likely to discount what is
said than when superstars deliver
essentially the same messageThe name evokes the idea that we hang the hat of someone from our past on someone in our present. For example, life can be difficult for someone whose appearance matches the appearance of a film actor who often plays villains. It's a manifestation of the halo effect in the realm of personal identification.
- Hat hanging can occur in supervisor-subordinate pairs when age differences approximate parent-child age differences. See "You Remind Me of Helen Hunt," Point Lookout for June 6, 2001, for more.
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More articles on Critical Thinking at Work:
- The Fallacy of the False Cause
- Although we sometimes make decisions with incomplete information, we do the best we can, given what
we know. Sometimes, we make wrong decisions not because we have incomplete information, but because
we make mistakes in how we reason about the information we do have.
- On the Risk of Undetected Issues: II
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on a path that possibly leads nowhere. Worse, time — that irreplaceable asset — passes.
How can we improve our ability to detect undetected issues?
- Virtual Clutter: II
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make work life so complicated — the virtual clutter.
- Wacky Words of Wisdom: V
- Adages, aphorisms, and "words of wisdom" are true often enough that we accept them as universal.
They aren't. Here's Part V of some widely held beliefs that mislead us at work.
- Be Choosier About Job Offers: II
- An unfortunate outcome of job searches occurs when a job seeker feels forced to accept an offer that
isn't a good fit. Sometimes financial pressures are so severe that the seeker has little choice. But
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Forthcoming issues of Point Lookout
- Coming October 4: Self-Importance and Conversational Narcissism at Work: I
- Conversational narcissism is a set of behaviors that participants use to focus the exchange on their own self-interest rather than the shared objective. This post emphasizes the role of these behaviors in advancing a narcissist's sense of self-importance. Available here and by RSS on October 4.
- And on October 11: Self-Importance and Conversational Narcissism at Work: II
- Self-importance is one of four major themes of conversational narcissism. Knowing how to recognize the patterns of conversational narcissism is a fundamental skill needed for controlling it. Here are eight examples that emphasize self-importance. Available here and by RSS on October 11.
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