I have a question regarding the assignment of correct responses to an event. The experiment I want to design is to first give the subject a cue at the beginning of a trial, the trial won’t advance to the next event until the subject presses 2 keys on the keyboard. Once they do that, a question will be provided and the subject has to choose a correct answer out of 4 options. The problem I have on hand is how to assign 2 correct answers (the 2 key press) to an event (the cue). The timing of when they press one key or another is irrelevant; that is, the order of the 2 key-pressing is not our concern, as long as they are both pressed. If anyone knows how to solve this, please let me know. Thank you very much for your help.