Here’s something strange: Ohio State researchers had college students fill out a survey about whether they were having doubts about their biggest life goals. Half the students used their dominant hand. The other half had to write with their opposite hand, producing wobbly, uncertain scrawl across the page.
The people who wrote with their “wrong” hand and were already struggling with goal doubts ended up more committed to their goals afterward. The ones who wrote neatly with their regular hand became less committed. Somehow the physical act of shaky handwriting changed how people felt about continuing toward becoming a doctor, or finishing a degree, or whatever major thing they were pursuing.
Patrick Carroll, the psychology professor who ran these experiments, says this happens because people use their chicken-scratch penmanship as an unconscious signal that maybe their responses to the survey aren’t trustworthy. If your handwriting looks uncertain, your brain treats your thoughts as uncertain too, even though the two things have nothing to do with each other.
And here’s where it gets twisty. When you’re already doubting your goal, adding more doubt doesn’t pile on top. It doubles back on itself. You end up doubting the doubt.
Thinking About Whether You Can Trust Your Own Thinking
Carroll tested nearly 400 people across two studies. Before the handwriting experiment with students, he ran a different version with people online. They filled out a scale measuring what researchers call an “action crisis,” that moment when you’re seriously weighing whether to keep going or quit. Then they did a supposedly unrelated writing exercise where they recalled either a time they felt confident in their thinking or a time they felt doubtful.
Same reversal pattern. People high in action crisis who recalled feeling doubtful showed higher commitment to their goals compared to those who recalled confidence. It’s like when you’re exhausted and can’t tell if you’re actually hungry or just tired, so you stop trusting the signal entirely and order pizza anyway. Except here, people stop trusting their doubts and the goal survives.
What Carroll’s measuring is meta-cognition, which is thinking about your thinking. There’s the first level: “I doubt I can finish medical school.” Then there’s the second level: “Wait, should I trust this doubt?” Most research on goal commitment focuses on that first level, just measuring how much doubt exists. Carroll wanted to know what happens when you mess with the second level, the confidence people have in their doubts.
“On some level, it may seem that doubt would be additive. Doubt plus doubt would equal more doubt,” Carroll explains. “But this study found the opposite: Doubt plus doubt equaled less doubt.”
The handwriting study showed this statistically. People who wrote with their non-dominant hand felt less certain about their survey responses (that’s the meta-cognitive part), which then predicted higher goal commitment. The doubt induction didn’t change their goals directly. It changed how much they trusted their feelings about those goals, which then changed everything.
Frankly, there’s something unsettling about this. Your life trajectory getting altered because you held a pen in your left hand instead of your right hand seems too fragile, too contingent on random factors that shouldn’t matter.
When You Actually Should Listen to Your Doubts
Carroll knows this technique could go wrong in multiple directions. The effect only worked in his studies because participants didn’t realize the doubt-inducing part (handwriting, memory exercise) was connected to their goal evaluation. If you know someone’s trying to make you question your doubts, it stops working.
Which means this might be more useful coming from a therapist or mentor who can help you examine whether your doubts deserve the weight you’re giving them, without making the strategy obvious. But even then, you’re getting into tricky territory.
Sometimes doubt is doing its job. Research on goal disengagement shows that letting go of unattainable goals and redirecting energy toward better alternatives correlates with improved wellbeing and lower depression. If you use this meta-cognitive trick to override legitimate signals that you’re on the wrong path, you might just be setting yourself up for a harder crash later.
Carroll specifically worries about undermining intellectual humility, that capacity to recognize the limits of your knowledge and stay open to being wrong. He mentions that the technique could be weaponized too, which is essentially what happens in gaslighting when someone systematically makes you doubt your valid perceptions.
The practical takeaway seems to be that this works best at genuine inflection points where doubts might be premature rather than prophetic. Like when you hit your first major setback in a long-term goal and your brain immediately jumps to “I should quit” before you’ve actually gathered enough evidence. That’s when questioning the doubt might buy you space to keep going.
But you’d need wisdom to know the difference between premature doubt and the kind of doubt that’s trying to save you from yourself. And if you had that wisdom, you probably wouldn’t need the handwriting trick in the first place.