What is the test for disqualifying a judge for prejudice?

^4. Under section 170.6, subdivision (a)(2), a party to an action or proceeding in an all-purpose assignment must file a peremptory challenge to disqualify a judge for prejudice within 15 days after receiving notice of the assignment, and may do so by simply filing a sworn statement without having to establish the prejudice as a fact to the satisfaction of a judicial body. (Barrett v. Superior Court (1999) 77 Cal.App.4th 1, 4.) If a peremptory challenge motion in proper form is timely filed, the court must accept it without further inquiry. (Ibid.)

^5. Separately, respondents request attorney fees on appeal.