Worked with a user today on an nback task. Like the GNAT, it's helpful to be aware that "-1" can be used as a valid response option. Like indicating "RT:57,-1" with a min-max value of 1000ms will...

Thanks Lori! Btw, for MediaLab users, check out this link:

www.empirisoft.com/support/showthread.php?t=491