Hello,

I am running an experiment where participants first answer attention checks and then perform the task. I want to group participants in the task app (after they have finished the attention check app). Group_by_arrival_time works well for this but also imposes that all participants in the group wait until one group is formed. 

Participants in my experiment do not need to wait for each other because they do not interact synchronously. I only need the grouping to calculate the payoffs after everyone has finished the study. Is there a way to use group_by_arrival_time at the beginning of the task app without imposing that participants wait to form a group? 

Thank you,
Razvan