Results from Stigler (1984) suggest that 11-year-old Taiwanese abacus experts ___
a. perform poorly on arithmetic problems when they are not able to use an abacus
b. perform better on mental arithmetic problems than their American peers
c. use a mental image of an abacus when they solve mental arithmetic problems
d. count on their fingers when they solve mental arithmetic problems
C
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According to recent studies, which of the following is true of centenarians?
The level of education is unrelated to the life span of centenarians. In developed countries, the number of centenarians is decreasing at a rate of approximately 7 percent each year. China has the most centenarians, followed by Brazil, Canada, and Australia. Chronic high-mortality diseases are markedly delayed for many years in centenarians.
During early childhood, boys __________ than girls
A) are less muscular B) are slightly larger C) have more body fat D) are slightly smaller