Adults in Japan, Canada, Australia, Finland and multiple other countries scored significantly higher than the United States in all three areas on the test.
Beyond basic reading and math, respondents were tested on activities such as calculating mileage reimbursement due to a salesman, sorting email and comparing food expiration dates on grocery store tags.
Not only did Americans score poorly compared to many international competitors, the findings reinforced just how large the gap is between American high- and low-skilled workers and how hard it is to move ahead when your parents haven't.
"The skills in the middle are required and we're not producing them," Carnevale said.
Respondents were selected as part of a nationally represented sample. The test was primarily taken at home using a computer, but some respondents used a printed test booklet.
In both reading and math, for example, those with college educated parents did better than those whose parents did not complete high school.
