How to translate skepticism?
You are absolutely correct to be skeptical about the translation offered. A more accurate translation for skepticism would be:

质疑精神

Breaking it apart,


  质疑 [zhì yí] means: 提出疑问 (raise a query, be critical minded) 精神 [jīng
  shén] means: 意识、思维 (spirit or mindset)


You can read more about 质疑精神 here.