Millisecond Forums

I have encountered a problem with getting Inquisit to process trial timeouts in the expected way. In an industrial QC simulation, the operator is to press a key ("D") if the current trial image (JPEG file) shows a defective product, and he should press the Spacebar (" ") if the product looks Okay. Also, IF HE DOES NOTHING for 10 seconds (trial timeout), that should be scored as a pass, same as pressing Spacebar. I use ("") to indicate no response in the script.
I define the "valid" and the "correct" responses separately for defective and Okay product images. An error message is to be shown briefly if the operator presses "D" for a good product or a different message is shown if he presses Spacebar, or lets timeout occur, when seeing a defective product.

What I find is that error messages and data scoring work as expected for the normal keypress responses, *but timeout is always scored as an error in either situation, even though I defined it as a correct response for Okay images.*
I have tried substituting "0" for "" to indicate timeout, but this produces another inappropriate set of behaviors by the program.
This seems like a straightforward program function but I have had no success in getting it to work. If I can't get this going, it is a total show-stopper for our project and I will have to try a different experiment builder program, wasting our investment of time & money in Inquisit! Any suggestions?

Below is the relevant code from my script. I apologize that this is long but I wanted to be sure to include the parts that might be causing the problem.

General setup:

/ mode = free
/ timeout = 10000


Define error messages:

/ numitems = 1
/ items = (" ERROR: product was defective ")
/ color = (255, 0, 0)
/ position = (50, 80)



/ numitems = 1
/ items = (" ERROR: product was Okay ")
/ color = (0, 255, 0)
/ position = (50, 80)


**DEFINE TRIALS:**

/ validresponse = ("D")
/ correctresponse = (" ", "")
/ errormessage = (errormessage2, 1000)
/ trialcode = "goodP"
/ response = all
/ frames = [10=picgoodprods]



/ validresponse = (" ", "")
/ correctresponse = ("D")
/ errormessage = (errormessage1, 1000)
/ trialcode = "badP"
/ response = all
/ frames = [10=picbadprods]


Define Block:

/ preinstructions = (Picintro1)
/ trials = [1-25 = noreplace(picgp, picbp, picgp)]
/ bgstim = (iftarget, ifnotarget)
/ blockfeedback = (correct)


Define Experiment:

/ preinstructions = (logo)
/ blocks = [1=practice]