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Why people don’t change their minds — even when faced with the facts

I’ve posted before about how cognitive dissonance (a psychological theory that got its start right here in Minnesota) causes people to dig in their heels and hold on to their beliefs even when faced with overwhelming evidence to the contrary.

Indeed, when people’s self-confidence is rattled (when facts intrude?), they may become even more hell-bent on sticking to their beliefs.

Now that we’re nearing the end of a truly nutty election cycle in which facts often have been ignored, forgotten and even reconstructed, I thought I’d revisit the topic.

In a recent post on his award-winning blog, Not Exactly Rocket Science, Ed Yong describes a new study by two Northwestern University marketing researchers, David Gal and Derek Rucker. “The duo carried out three experiments involving issues such as animal testing, dietary preferences, and loyalty towards Macs over PCs,” Yong writes. “In each one, they subtly manipulated their subject’s confidence and found the same thing: when faced with doubt, people shout even louder.”

Here’s Yong’s description of one of the ingeniously designed experiments [reader alert: British spellings]:

Gal and Rucker asked 88 students to write about their views on animal testing for consumer goods, but only half of them were allowed to use their preferred hand. This may seem random, but previous studies have shown that people have less confidence in what they write with the hand they’re less comfortable with. Indeed, that’s what Gal and Rucker found in their study. When asked later, the volunteers who didn’t use their dominant hand were less confident in their views.
However, they were also more likely to try and persuade others of those same views. When they were asked to write something to persuade someone else about their opinions, those who felt less confident wrote significantly longer missives. With a sliver of doubt in their minds, they spent more effort in their attempts at persuasion.
Gal and Rucker also found that this extra effort vanished if the volunteers had a chance to affirm their own identity beforehand. If they were asked to identify their favourite items (books, cities, songs and so on) before writing about animal testing, the choice of hand had no effect on their advocacy attempts. If they were asked to say what their parents’ favourite things were, the hand effect reappeared.

The results from the researchers’ other two experiments (involving the participants’ beliefs about vegetarianism/meat eating and Macs/PCs) were similar.

“In all three cases, Gal and Zucker found that doubt turns people into stronger advocates,” writes Yong. “More subtly, their study shows that this effect is stronger if someone’s identity is threatened, if the belief is important to them, and if they think that others will listen. It all fits with a pattern of behaviour where people evangelise to strengthen their own faltering beliefs.”

As Gal and Zuker write in their study, which appears in the journal Psychological Science:

“The present research also offers a warning to anyone on the receiving end of an advocacy attempt. Although it is natural to assume that a persistent and enthusiastic advocate of a belief is brimming with confidence, the advocacy might in fact signal that the individual is boiling over with doubt.”

Something to think about as you listen to all the angry politicians and political pundits this weekend.

Comments (7)

  1. Submitted by Jane Cracraft on 10/29/2010 - 10:40 am.

    Interesting. I like these occasional medical columns that go a little more in depth.

  2. Submitted by Craig Westover on 10/29/2010 - 11:59 am.

    “A weak man has doubts before a decision, a strong man has them afterwards.”

  3. Submitted by William Pappas on 10/30/2010 - 05:07 am.

    This research must explain why Tea Party members, many of whom are retired or nearing retirement, feel nobody is really entitled or worthy of medicare but them. It also must explain why so many of them think that insurance reform is a bad thing even though it overwhelmingly benefits everyone but insurance executives who make their living denying people their rightful benefits. Maybe it also explains how republicans can advocate for the very economic policies that led to a near depression and gutting of home values and retirement accounts of the entire middle class and that a lot of people still believe them. Thank you, I was beginning to think there wasn’t a name for their tortured logic.

  4. Submitted by Richard Schulze on 10/30/2010 - 07:02 pm.

    It’s tempting to make this a huge gotcha point and slam Tea Partiers for cognitive dissonance, but the holding of conflicting beliefs is one of America’s deepest and most common traditions.

    Voters think that addressing the deficit is important, but they vehemently oppose cuts to programs constituting the overwhelming majority of the federal budget, and they aren’t too anxious to raise taxes either.

  5. Submitted by Paul Udstrand on 11/01/2010 - 10:12 am.

    There’s another way of looking at this: Ego. When people tie their beliefs and decisions to their egos their thinking gets fuzzy. One difference between a well trained intellect and a poor intellect is the ability to make evidence based decisions and evaluations. That requires an ability to compensate for one’s ego. It can be done. We do a real poor job of training intellects in the country. Our culture and educational system all focus on ego or self esteem instead of rational decision making. The focus on consumerism likewise emphasizes personal choice over consequences. We end up teaching people that all that matters is how one feels, and feels about oneself rather than whether or not one makes good decisions. Conversely, it also encourages mediocrity by generating anxiety about making mistakes. Rather than viewing mistakes as part of a learning process, they are viewed as bad outcomes that make people feel bad. Mistakes make people losers, and everyone wants to be a winner. So you have the double whammy of really poor decision making coupled with risk aversion.

    You can complain about the Tea Party if you like, and they certainly have all the characteristics of True Believers. But they’re a very small portion of the population. Republicans are not going to be elected by Republicans voting for Republican in the next election- they will get elected by Democrats voting for Republicans; try to get your head around that without resorting to cognitive dissonance.

  6. Submitted by Dave Burton on 05/09/2019 - 09:19 pm.

    When a belief has been held for long time, it settles into the mind, and becomes comfortable there, and is reluctant to leave. People who have been convinced of something, if they’ve held that belief for a long time, rarely become unconvinced of it later, if the evidence which convinced them is shown to be false.

    That’s why the Big Lie works so well.

    It’s also why campaigns to indoctrinate children, and turn them into activists for ___(fill-in-your-favorite-cause-here)___ are dangerous. Most kids are not equipped to weigh evidence, and recognize & reject propaganda. (Most adults aren’t either, but they’re better equipped than children!)

    Once the tykes have internalized the propaganda, in most cases it won’t matter how much contrary evidence they’re shown. Their little minds are made up, and they will probably stay made up even through adulthood.

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