Among the survey's findings: People in every country surveyed significantly underestimate levels of sexual harassment. The largest gaps between perception and reality on this topic are in Denmark, the Netherlands, France and the United States.
For example, when respondents were asked to estimate how many out of every 100 women will say they have experienced a form of sexual harassment since the age of 15, in Denmark the average guess was 36. The actual figure is 80. In the United States, the average guess was 51. The actual number was 81, a percentage difference of a third.
In every country surveyed, men guessed lower than women for the level of sexual harassment women have experienced. Swedish men were the most wrong about that, followed by men in the United States, the United Kingdom, Spain, France and Belgium.
Every country vastly overestimated the proportion of unemployed people looking for a job. The average guess across the study was 34 percent, a number five times greater than the actual figure of 7 percent. Mexicans and Brazilians were particularly liable to guess incorrectly. The percentage difference between the average guess and the actual number in these countries was 47 percent too high.
In the U.S., there was an 18 percent overestimate.
The majority of countries hugely overestimated levels of immigration. The average guess across 37 countries is that 28 percent are immigrants when the actual figure is less than half that at 12 percent. In the U.S., people guess that 29 out of 100 people were immigrants (defined as not born in the U.S.). The actual number was 15.
South Africans were especially prone to overestimating the number of Muslims they believe to be living in their country. South Africans guessed that it was 26 out of 100 people. The actual figure is two out of every 100.
Malaysians are too optimistic about what percentage (34 percent vastly overestimated this) of energy consumed in their countries comes from renewable sources such as wind or solar power. Every country underestimates how many of the past 18 years have been the hottest on record since 1961. The average guess was nine years. It is 17 years.
The British think 18- to 29-year-olds are having far steamier sex lives than they actually do. They think young women are having sex 13 times every four weeks (it is four-five times) and young men are having sex 14 times every four weeks (the actual average is five times).
The survey, now in its fifth year, found that Thailand and Mexico are the two countries where people are the least accurate in their perceptions while those in Hong Kong and New Zealand are consistently the most accurate. The U.S. dropped seven places from its position in the survey last year to finish 23rd in 2018 in terms of overall accuracy.
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