How can you tell if someones lying? The answer is, theyre probably not.
Traditional economics says that people are rational beings who will lie if its to their advantage. A recent university study has shown that, actually, were pretty honest - especially when were at home.
Researchers in Germany phoned people at home and asked them to toss a coin. There was a strong financial incentive1 to fake the result: if the coin landed tails-up, the participant would receive money or a gift voucher2, while if the coin landed heads-up, they would get nothing. Because they were on the phone, they knew there was no risk of getting caught if they lied.
And yet people told the truth. Over hundreds of tosses a coin will land tails-up roughly 50% of the time. In this study over half the people asked said that the coin landed heads-up, which meant they would receive nothing.
Previous studies had found that people were more deceitful. In those laboratory studies 75% of people reported a winning coin and claimed a reward. So the research team thinks its being in our own homes which makes us play fair, although its not yet clear why.
In fact both types of study show people are surprisingly trustworthy. Even in the laboratory, 25% of people turned down a reward by telling the truth. The researchers say this is because honesty is highly valued in human society. We care about our reputation and our sense of ourselves as decent people. So lying has a psychological cosplayt and it seems this cosplayt outweighsthe financial benefits of lying.
