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. Author manuscript; available in PMC: 2016 Jun 28.
Published in final edited form as: J Econ Sci Assoc. 2016 Jan 11;2(1):48–59. doi: 10.1007/s40881-015-0021-3

Table 3.

Answers to comprehension questions in CL and OE

CL (n = 107) OE (n = 102) Tests p-value

Question 1 6.40 (2.34) 4.90 (2.40) Mann-Whitney 0.000

Question 2
a) 5.6% 23.5% χ2test 0.000
b) 14% 27.5% χ2test 0.016
c) 15% 26.5% χ2test 0.040

Question 3
a) 20.6% 32.4% χ2test 0.053
b) 38.3% 59.8% χ2test 0.002
c) 39.3% 60.8% χ2test 0.002

Notes: all percentages are percentages of wrong answers.