I’m programmin an oddball task to collect P300 erps for my motivation study. I programmed the stimuli presentation in such a way that my oddball can appear at the 7th, 8th, 9th or 10th position. I programmed the oddball task easily with the builder. But now, I’m figuring out whether I can use the builder stuff for sending triggers. The program must send a trigger as soon as the oddball is presented. I’m thinking of using the code component and write out a small “if” instruction. Does anyone have another clue?