Table 2.

Questions and correct answers used in the experiments.

Number	Question	Answer (%)
1	What percent of the world’s roads are in India?	9.7
2	What percent of the world’s telephone lines are in China, USA, or the European Union?	52.0
3	Saudi Arabia consumes what percentage of the oil it produces?	72.1
4	What percent of the world’s population is between 15 and 64 years old?	65.2
5	What percent of the world’s population is Christian?	31.4
6	What percent of the worldwide labour force works in the service sector?	50.6
7	What percent of the worldwide gross domestic product (GDP) is re-invested?	25.2
8	What percentage of Japanese adult males smoke?	27.1
9	What percentage of Japanese households have a fixed-line phone?	69.0
10	What percentage of the world’s countries have a higher life expectancy than the United States?	22.6