Brandon Keim in Wired:
A series of experiments on more than 300 people from the U.S. and Korea found that thinking in a second language reduced deep-seated, misleading biases that unduly influence how risks and benefits are perceived.
“Would you make the same decisions in a foreign language as you would in your native tongue?” asked psychologists led by Boaz Keysar of the University of Chicago in an April 18 Psychological Science study.
“It may be intuitive that people would make the same choices regardless of the language they are using, or that the difficulty of using a foreign language would make decisions less systematic. We discovered, however, that the opposite is true: Using a foreign language reduces decision-making biases,” wrote Keysar’s team.
Psychologists say human reasoning is shaped by two distinct modes of thought: one that’s systematic, analytical and cognition-intensive, and another that’s fast, unconscious and emotionally charged.
In light of this, it’s plausible that the cognitive demands of thinking in a non-native, non-automatic language would leave people with little leftover mental horsepower, ultimately increasing their reliance on quick-and-dirty cogitation.
Equally plausible, however, is that communicating in a learned language forces people to be deliberate, reducing the role of potentially unreliable instinct. Research also shows that immediate emotional reactions to emotively charged words are muted in non-native languages, further hinting at deliberation.
More here.