Table 1: Summary of confirmatory factor analysis.

SD CRAVE

Skill.87.91.72
 I am extremely skilled at playing the game.3.340.810.83
 I have rich knowledge regarding the game.3.680.820.86
 Compared to most gamers, I am more familiar with the game.3.200.950.91
 My skill in playing the game is superior to using other software.3.310.920.78

Challenge.87.90.76
 Playing the game challenges me to perform to the best of my ability.2.930.980.90
 Playing the game challenges me.3.350.970.78
 I find that playing the game stretches my capabilities to my limits.2.801.000.93

Flow.87.92.85
 I have experienced flow when playing the game.3.001.150.85
 I frequently experience flow when playing the game.2.510.980.99

Boredom.73.98.95
 I feel much more skilled than other gamers when playing the game.3.090.860.98
 Tasks in the game are very easy for me to complete.3.110.850.66

Frustration.84.90.75
 I find the game too frustrating.2.330.810.71
 I find the game too complex.2.300.830.88
 I find the game too difficult.2.200.790.98

Apathy.96.98.91
 I find the game boring.2.200.860.95
 I find the game uninteresting.2.180.860.98
 I find the game dull.2.150.870.98
 I find the game unattractive.2.050.830.90