Table 1.

The Problem Gambling Severity Index compared to the Tang et al.’s problematic participation in gacha mechanics scale (with changes marked with red italics).

Item	Problem Gambling Severity Index (PGSI)	Tang et al. problematic participation in gacha mechanics scale	Differences and potential issues (aside from changing the subject matter)
1	Have you bet more than you could really afford to lose?	你有沒有 向手機遊戲內的抽蛋活動 投下超出你能力可承受的 金額 ? [Have you ever bet more money than you can afford in a gacha event in a mobile game ?]	N/A
2	Have you needed to gamble with larger amounts of money to get the same feeling of excitement?	你需要藉由 課更多金錢去抽蛋 , 來得到 你所想要的興奮程度 嗎? [Have you needed to spend more money on gacha to get the level of excitement you want ?]	The ‘same feeling’ was substituted with ‘the level of excitement you want’.
3	When you gambled, did you go back another day to try to win back the money you lost?	如果你課金後抽不到你想要的東西, 你會為了不浪費之前投下的金錢, 再次課金嗎? [ When you could not obtain your desired rewards from paying for gacha mechanics, did you pay money again to participate more because you did not want to waste the money you previously invested? ]	The additional explicit justification of ‘did not want to waste the money you previously invested’ and the omission of the reference that the subsequent activity should occur at a later date.
4	Have you borrowed money or sold anything to get money to gamble?	你會 因課金抽蛋 而去借錢或賣東西嗎? [Have you borrowed money or sold things to spend money on gacha mechanics ?]	N/A
5	Have you felt that you might have a problem with gambling?	你有沒有覺得你 課金抽蛋的行為 可能存在問題? [Have you felt that you might have a problem with spending money on gacha mechanics ?]	N/A
6	Has gambling caused you any health problems, including stress or anxiety?	課金抽蛋的行為 曾給你帶來過健康問題嗎? 包括壓力或焦慮? [Has your behavior of spending money on gacha mechanics caused you any health problems? Including stress or anxiety?]	N/A
7	Have people criticised your betting or told you that you had a gambling problem, regardless of whether or not you thought it was true?	有沒有人曾指責或告訴過 你課金抽蛋的行為 有問題, 無論你認為這是正確的 還是錯誤的 ? [Have people criticised your behavior of spending money on gacha mechanics or told you that you had a problem, regardless of whether you thought it was true or false ?]	The additional explicit mention of the suggestion potentially being ‘false’.
8	Has your gambling caused any financial problems for you or your household?	你曾試過因 課金抽蛋 而導致你或你的家庭出現經濟問題嗎? [Has your spending on gacha mechanics caused any financial problems for you or your household?]	N/A
9	Have you felt guilty about the way you gamble or what happens when you gamble?	你有沒有對 自己課金抽蛋的行為 感到過內疚? [Have you felt guilty about your behaviour of spending money on gacha mechanics ?]	The clause ‘or what happens when you gamble’ was omitted.