Hi sorry I have a similiar issue, I just wanted to see if it would apply to my problem. I have also created a task looped from an excel file with 50 rows. I currently have it working from a place in which the participant provides a rating at each row. I was hoping to change my task (because it takes too long) to get ratings for the first 10 rows. Then to only trigger a rating for every second row for the next rows that comes through (with odd rows having the stimulus appear for two seconds then moving to the next row). Would I use a simliar method to yours here?