Table 1.
Group differences in demographic and psychological variables
| IGD (n = 53) | HC (n = 58) | t | P | η p 2 | |||
|---|---|---|---|---|---|---|---|
| Mean | SD | Mean | SD | ||||
| Age | 23.55 | 4.88 | 24.90 | 3.40 | −1.70 | .091 | ‐ |
| Sex, n | M = 50, F = 3 | M = 53, F = 5 | ‐ | ‐ | ‐ | ||
| Education | 12.88 | 1.56 | 14.63 | 1.82 | −5.34 | <.001 | 0.21 |
| IQ | 104.78 | 17.68 | 117.86 | 10.96 | −4.68 | <.001 | 0.17 |
| Time_D | 8.59 | 7.41 | 0.78 | 1.11 | 9.64 | <.001 | 0.37 |
| Time_W | 10.02 | 7.6 | 1.28 | 2.31 | 11.81 | <.001 | 0.39 |
| IAT | 64.63 | 16.72 | 29.98 | 8.26 | 13.46 | <.001 | 0.64 |
| BDI2 | 18.75 | 11.85 | 3.53 | 3.91 | 7.54 | <.001 | 0.44 |
| BAI | 16.35 | 13.97 | 4.51 | 4.58 | 4.76 | <.001 | 0.26 |
| AQ | 74.59 | 16.91 | 54.25 | 11.77 | 6.27 | <.001 | 0.34 |
| BIS11 | 67.18 | 10.61 | 55.51 | 7.61 | 6.04 | <.001 | 0.29 |
| BIS | 21.63 | 4.60 | 17.56 | 3.89 | 4.58 | <.001 | 0.19 |
| BAS | 35.02 | 6.79 | 32.77 | 6.54 | 1.19 | .235 | ‐ |
| AUDIT | 5.09 | 4.64 | 5.05 | 3.38 | 0.05 | .964 | ‐ |
Abbreviations: AQ, Korean version of the Buss‐Perry Aggression Questionnaire; AUDIT, Korean version of the Alcohol Use Disorder Identification Test; BAI, Korean version of the Beck Anxiety Inventory; BDI2, Korean version of the Beck Depression Inventory‐2; BIS/BAS, Korean version of the Behavioral Inhibition System/Behavioral Approach System (BIS/BAS) scales; BIS11, Korean version of the Barrett Impulsiveness Scale‐11; HC, healthy control; IAT, Korean version of the Young Internet Addiction Test; IGD, Internet gaming disorder; IQ, intelligence quotient; Time_D, time spent for Internet gaming during weekday per hour/day; Time_W, time spent for Internet gaming during weekend per hour/day.