Ever met someone who makes a questionable decision and then acts as if they’ve just solved one of life’s greatest mysteries? Maybe they believe every dramatic headline they see, fall for fancy-sounding nonsense, or spend money on something they don’t need simply because it’s on sale.
Here’s the interesting part: psychologists have studied several everyday thinking habits linked to differences in cognitive ability and decision-making skills.
But before you start mentally evaluating your coworkers, friends, or that one relative who believes everything on Facebook, there’s something worth knowing. Intelligence isn’t measured by a handful of annoying habits. Even highly intelligent people make questionable decisions.
Still, research has uncovered common thinking traps worth noticing, especially if you want to make smarter everyday choices.
They Accept the First Answer Without Questioning It
Sometimes, the first answer that pops into your head feels so obvious that checking it seems unnecessary.
Imagine calculating a discount while shopping. The number looks right, so you move along without checking your math. Unfortunately, your mental calculator had other plans.
A 2011 study by psychologists Maggie Toplak, Richard West, and Keith Stanovich examined 346 participants and found connections between cognitive reflection, intelligence, and reasoning performance.
People who performed better on reflection tasks were generally better at recognizing when an intuitive answer needed closer examination.
The takeaway? Being quick isn’t necessarily the same as being accurate. Sometimes, the smartest move is giving your brain a few extra seconds.
They Believe Headlines Simply Because They Sound Convincing
We’ve all encountered those dramatic social media headlines that practically beg to be shared.
A celebrity supposedly said something outrageous. A household product apparently has a shocking hidden use. Suddenly, the family group chat is buzzing.
But how often does anyone actually check the story?
A 2019 study by researchers Gordon Pennycook and David Rand involving 3,446 participants found that stronger analytical reasoning was associated with better ability to distinguish true headlines from false ones.
Interestingly, this relationship appeared even when misleading headlines aligned with participants’ political beliefs.
Of course, believing one false story doesn’t reveal someone’s intelligence.
A practical habit is to check the original source, publication date, and supporting evidence before accepting a sensational claim.
They Confuse Complicated Language With Actual Wisdom
Some statements sound incredibly intelligent until you stop and ask what they mean.
Consider this sentence: “Wholeness quiets infinite phenomena.”
Sounds mysterious, right? Maybe even profound.
Except it was among the deliberately meaningless statements used in a 2015 study by Pennycook and colleagues.
Researchers found that people who rated such statements as especially profound tended to perform less well on certain verbal, numerical, and reasoning measures.
That doesn’t mean poetry, spirituality, or complicated writing is meaningless.
The distinction is whether the words communicate an understandable idea.
Next time someone delivers a speech packed with impressive vocabulary, try asking, “What does that actually mean?”
It’s a surprisingly effective question.
They Constantly Choose Smaller Rewards Right Now
Would you rather receive $20 today or $40 next week, assuming the later payment is guaranteed?
Your answer might depend on your circumstances, but psychologists have studied how people weigh immediate rewards against larger delayed ones.
A 2008 meta-analysis by Noah Shamosh and Jeremy Gray examined 24 studies and found a modest association between higher intelligence and greater willingness to wait for larger rewards.
This tendency is called delay discounting.
In everyday life, it might resemble repeatedly choosing a small immediate benefit over a significantly better future opportunity.
However, waiting isn’t always the right choice. Someone facing urgent financial needs may have perfectly sensible reasons to take the money now.
The useful lesson is to consider what you’re giving up before choosing instant gratification.
They Fall for Different Packaging of the Same Information
Picture two packages of ground beef.
One says “80% lean.” The other says “20% fat.”
Which sounds more appealing?
If you immediately preferred the first one, you’re experiencing something researchers call the framing effect.
Both labels communicate the same basic information, but their wording creates different impressions.
In a 2007 study involving 360 adults, researchers Wändi Bruine de Bruin, Andrew Parker, and Baruch Fischhoff examined how people handled decision-making tasks, including equivalent information presented differently.
Their research linked overall decision-making competence with cognitive ability.
The practical trick is simple: translate attractive claims into comparable numbers before making decisions.
Whether you’re comparing groceries, insurance policies, or product advertisements, presentation shouldn’t outweigh substance.
They Forget Their Own Rules When Making Decisions
Imagine shopping for a laptop.
You’ve decided it must have at least 16GB of RAM, fit your budget, and offer decent battery life.
Then you see one with a gorgeous screen and sleek design.
Suddenly, your carefully planned requirements disappear.
Sound familiar?
Researchers studying adult decision-making competence have examined how accurately people apply specific rules when comparing multiple options.
Their findings suggest that performance on these tasks is associated with aspects of cognitive ability.
However, changing your priorities isn’t automatically a sign of poor reasoning. New information can legitimately change what matters.
The trouble begins when you forget your original requirements without realizing it.
A simple written checklist can help prevent flashy features from distracting you from what you actually need.
They Make Risk Predictions That Don’t Add Up
Here’s a little brain teaser.
Can something be more likely to happen within one year than within five years, assuming we’re talking about the same event and the same starting point?
Nope.
Yet people sometimes make probability judgments that contradict basic mathematical relationships.
Research on adult decision-making has examined these inconsistencies, including estimates about events occurring within different time frames.
A 2012 analysis by Bruine de Bruin and colleagues found a positive relationship between fluid cognitive ability and consistency in risk judgments.
This doesn’t mean worrying about something makes someone less intelligent.
It simply highlights how easily our perceptions of risk can become inconsistent.
When evaluating a potential problem, compare the actual probabilities rather than relying entirely on how frightening something sounds.
They Keep Making Bad Investments Because They’ve Already Spent Money
You paid for a movie ticket, but the movie is painfully boring.
You could leave and enjoy the rest of your evening. Instead, you stay because you already paid.
Congratulations, you’ve encountered the sunk-cost effect.
This thinking trap happens when people allow money, time, or effort they’ve already invested to influence decisions about what to do next.
Research on decision-making competence has found associations between cognitive ability and resistance to sunk-cost errors.
Interestingly, researchers have also observed that older adults can have an advantage in resisting this particular trap.
Of course, persistence can be sensible when continuing still offers worthwhile benefits.
The important question is whether you’re moving forward because the future looks promising or simply because you’ve already invested so much.
The Bottom Line
Nobody gets every decision right, regardless of intelligence, education, or experience.
Research suggests certain reasoning patterns are associated with cognitive performance, but these behaviors aren’t reliable ways to judge someone’s IQ.
The encouraging part is that everyday decision-making also involves habits, experience, attention, and motivation.
Checking information, questioning first impressions, comparing numbers, and reconsidering old investments can all help.
Perhaps the smartest habit of all is recognizing that your own thinking deserves as much scrutiny as everyone else’s.
