Individual items Individual items Knowledge level (N) Knowledge level (N) Knowledge level (N) Knowledge level (N)
1 (325) 2 (682) 3 (770) 4 (82)
Q1-a A 3.314 3.430 3.626 3.941
Others 2.991 3.146 3.196 3.558
Difference 0.323 0.284 0.430 0.383
Q1-b AB 3.188 3.554 3.587 4.500
Others 3.157 3.098 3.256 3.389
Difference 0.031 0.456 0.331 1.111
Q1-c B 3.519 3.770 4.095 4.174
Others 3.423 3.444 3.587 3.686
Difference 0.096 0.326 0.508 0.488
Q1-d O 2.878 2.949 3.235 3.765
Others 2.734 2.954 3.000 3.066
Difference 0.144 -0.005 0.235 0.699
Q1-e AB 2.781 3.108 3.627 4.375
Others 2.265 2.436 2.580 2.882
Difference 0.516 0.672 1.047 1.493
Q1-f O 3.061 3.097 3.176 3.941
Others 2.787 2.957 3.130 3.046
Difference 0.274 0.140 0.046 0.895
Q1-g B 2.896 3.297 3.367 3.739
Others 3.006 2.957 3.161 3.502
Difference -0.110 0.340 0.206 0.237
Q1-h A 3.322 3.604 3.816 4.029
Others 3.296 3.548 3.633 4.089
Difference 0.026 0.056 0.183 -0.060
Q1-i O 2.714 2.940 3.529 4.000
Others 2.689 3.052 3.226 3.501
Difference 0.025 -0.112 0.303 0.499
Q1-j O 3.347 3.493 3.265 4.000
Others 3.087 3.152 3.364 3.326
Difference 0.260 0.341 -0.099 0.674
Q1-k AB 2.188 2.615 2.827 2.875
Others 2.055 2.206 2.317 2.727
Difference 0.133 0.409 0.510 0.148
Q1-l A 3.356 3.528 3.534 3.824
Others 3.223 3.252 3.402 3.424
Difference 0.133 0.276 0.132 0.400