hello 
I am developing an online game with 2 participants at the same time with otree and I want to put some attention checks in the begining to filter the participants who didnt pay attention to the instructions. after that I want to use prolific to collect data. 
there is a consideration here
if the participant failes to answer the questions and redirects to the prolific first page, what will happen to the other participant? will it automatically find an other participant and replace it with the last one or I should do something about it? 
thanks

Use group_by_arrival_time in the app after the attention check.