Yeah, I had thought about the no response option, but we wanted to keep the ability to identify whether they had identified the object correctly or not, and we can always use the response window RT to create error data from responses that were too long.

Anyway, one other problem I've encountered that is related to my problem. I wanted to create a big X when participants go too slowly, but the styles file limits me to 96 point font, which actually is not that large of an X. Is there a way to use a larger font within the style file?