2,500 people exposed a new bias that keeps you on the wrong path

Here's a question you've probably never thought to ask: how often do you take a longer route, waste extra hours on a project, or stick with a failing strategy simply because switching would mean undoing something you already did?

According to research published in Psychological Science by UC Berkeley's Kristine Cho and Clayton Critcher, the answer is: far more often than you realize. Their four studies, involving 2,524 participants, revealed a brand-new cognitive bias they call "doubling-back aversion," the deep-seated refusal to take a better path when it requires retracing visible progress.

31% chose the faster route. The other 69% watched themselves lose.

In the first experiment, participants navigated a virtual-reality environment where two paths led to the same destination. One path was shorter but required backtracking through territory they had already crossed. The other was longer but moved exclusively forward. Only 31% chose the shorter backtracking path. When the same shortcut didn't involve retracing steps, 57% took it. The mere appearance of going backward cut the adoption rate nearly in half.

That gap is hard to explain away as laziness or confusion. Participants understood both routes. They could see the distances. They chose the slower option anyway, because the faster one felt like failure.

The 50-point collapse nobody expected

The second study made things even starker. Participants worked on a word-generation task and were offered the chance to switch to an easier version. When the switch was framed as a simple choice, 75% of people took it. When the exact same switch was described as "doubling back," acceptance plummeted to 25%.

Cho herself told PsyPost that the 50-percentage-point drop was so dramatic that "my first reaction was to suspect a coding error." It wasn't. Across all four experiments, the pattern held: people consistently rejected objectively superior options when accepting them meant visually erasing progress.

Why this isn't the sunk cost fallacy

You might think this is just the sunk cost fallacy (throwing good money after bad because you've already invested) wearing a new label. It isn't. The sunk cost fallacy is about past investments: money spent, time committed, emotional energy burned. Doubling-back aversion is specifically about the visual and psychological experience of undoing forward movement.

The researchers identified two distinct mechanisms driving the bias. First, people feel that doubling back erases their initial progress, making prior effort feel wasted. Second, they perceive the remaining work as heavier because they're "restarting" rather than continuing. Both of these are illusions. The total work is less. But the feeling of going backward transforms what should be an obvious upgrade into something that feels like punishment.

Where this costs you in real life

Think about how many decisions involve some version of doubling back. You're 18 months into a degree program and realize a different major would get you hired faster, but switching means retaking a few prerequisites. You've spent three months building a feature and discover a library that does it better, but adopting it means scrapping your existing code. You've driven 20 minutes toward a restaurant and learn of a better one back near your house.

In each case, the rational move is clear. And in each case, doubling-back aversion whispers: "But you've already come this far."

This bias operates below conscious awareness, which is what makes it so costly. You don't decide to be irrational. You simply feel, with genuine conviction, that pushing forward is the responsible choice. The progress you can see becomes an anchor you can't release.

The reframe that breaks the loop

Cho and Critcher found one intervention that consistently weakened the bias: reframing the backtrack as learning rather than loss. When participants were encouraged to view their initial progress as information gathered (not wasted effort), willingness to switch increased significantly.

The practical takeaway is deceptively simple. Next time you catch yourself resisting a clearly better option because it means undoing something visible, ask one question: "Am I choosing this path because it's actually faster, or because turning around feels like admitting I was wrong?"

If you hesitate before answering, you already know which bias is driving.