Have no response as a response

[jarvis24]

In v2006, you can use -1 as a keycode to represent "no response" as if it were just like any other key press. That means you can list it with other keycodes, either first to indicate it's the correct answer or later in the list to indicate that it's incorrect. If the subject waits as long as the max value then that's like pressing the "-1" key. Note: see www.empirisoft.com/support/showthread.php?t=94 for notes regarding a bug that had the potential to affect the 'no response' option in versions 2006.1.12 - 2006.1.15.