The experiment that spoiled the food on purpose
Psychologists David Neal and Wendy Wood put it to the test. Before a screening, around 100 moviegoers each got a bucket of popcorn. Some got fresh popcorn, others got popcorn made a week earlier: soggy, chewy, and plainly unpleasant. No one pretended it was good: on their way out, people honestly gave it low ratings.
Then things got interesting. For people who rarely eat popcorn at the movies, the bad taste was a deterrent: they ate noticeably less than their neighbors with fresh buckets. But for moviegoers with a strong habit, there was almost no difference. They chewed through stale popcorn just as they would have eaten the usual kind.
Week-old popcorn. People in the habit of buying it at the movies barely slowed down: the taste did not affect their choice.
The same stale popcorn and the same regular moviegoers, but videos at a table instead of a screening. Here they ate noticeably less: the habit did not travel with the bucket.
The setting, not taste, triggers a habit
A habit is a "cue -> action" link in which the goal no longer plays a part. Darkness, the seat, ads before the movie, a bucket in your lap: this whole set of cues has repeatedly ended with your hand reaching for popcorn. After enough repetitions, the cue starts triggering the movement directly, bypassing the question "do I even want to eat this?" Taste gets checked afterward - if it gets checked at all.
That is why the staleness did not work as a stop signal. It was an argument in a conversation that never happened.
In the same series of experiments, moviegoers were asked to eat with their non-dominant hand. It sounds silly, but it disrupts the learned movement - and people with a strong habit immediately ate less of the unpleasant popcorn. Not because they became more restrained, but because the action stopped being automatic and taste finally got a say. These were several experiments on one specific habit, so it is not wise to apply this measure to everything, but the mechanism is especially clear in them.
Pause before the second handful
One slow inhale and exhale before reaching into the bag again works on the same principle as using an awkward hand. This is not willpower: the pause simply breaks the "cue -> movement" chain and leaves a gap for the question of taste to slip in.
- Notice not the food, but the moment: where you are sitting, what is playing, what is in your hands
- Before the second handful, ask yourself: is it tasty, or just routine?
- Make the movement awkward: use your other hand, a plate instead of a bag, keep the bucket off your lap
- Change the setting, not your resolve: it is easier to manage the cue than yourself
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Sources
- D. T. Neal, W. Wood, M. Wu, D. Kurlander, "The Pull of the Past: When Do Habits Persist Despite Conflict With Motives?", Personality and Social Psychology Bulletin, 2011