① The “American Dream” promises that in the Land of Opportunity, any individual can climb the economic ladder and prosper through hard work and ambition alone. And yet, young Americans today are struggling to earn more than their parents did at the same age, and upward mobility in the US actually compares unfavourably to that of other industrialised nations.

② So why does the idea of the American Dream persist? A new study in the American Journal of Political Science identifies one factor that has been overlooked: the influence of reality TV.

③ Reality shows have come to dominate US television over the past 20 years, notes Eunji Kim from Vanderbilt University. And the overwhelming majority of these have a “rags-to-riches” storyline: they feature ordinary Americans who work hard to achieve great economic success. And while these programmes are regularly among the most-watched shows, news broadcasts — which paint a more realistic view of the economic hardship faced by millions of Americans — get a much smaller proportion of the viewership.

④ Rags-to-riches stories are ubiquitous ( 无处不在的) on TV — but does watching these programmes actually convince people that economic mobility is easily attainable? To find out, Kim’s team had participants watch a 5-minute clip from a reality show with a rags-to-riches storyline. Control participants watched a clip from a reality show that didn’t have a rags-to-riches story. After watching the shows, participants rated how much they agreed with four statements relating to the American Dream.

⑤ The results showed that those who’d watched a rags-to-riches clip did indeed have a significantly greater belief in the American Dream. Interestingly, when participants were separated by party affiliation, this effect was significant among Republicans but not Democrats, suggesting that the kind of messages implicit in these TV shows may play into people’s existing socioeconomic beliefs.