feedback display problem with incorrect state

Fri Apr 20 18:10:42 UTC 2012

Note further that, as reported at 
http://support.pstnet.com/forum/Topic5917-12-1.aspx 
, the new Script Generation features introduced 
in EP2.0.10.128 can alter the order in which 
instructions occur in the program.  I tested this 
and it does not make a difference in this case, 
but may create problems in other cases.  This new 
feature promises some real improvements to our 
programs, but may take some getting used to, so beware.

-----
David McFarlane
E-Prime training 
online:  http://psychology.msu.edu/Workshops_Courses/eprime.aspx
Twitter:  @EPrimeMaster (twitter.com/EPrimeMaster)

At 4/20/2012 12:47 PM Friday, David McFarlane wrote:
>Oh, it occured to me that you might like a 
>workaround so that you can get on with your work 
>until PST fixes this in a later realease.  The 
>workaround is simple, and obvious.  In an InLine 
>after your Stimulus and before your Feedback, 
>place the following code (I have tailored this 
>to your example program; others may have to edit 
>the name of Feedback to match their programs):
>
>     ' Code to workaround FeedbackDisplay image load bug in EP2.0.10.182.
>     If Stimulus.ACC = 1 Then  ' Correct
>         Feedback.ActiveState = "Correct"
>     Else  'Incorrect or No Response
>         If Len(Stimulus.RESP) > 0 Then  ' Incorrect
>             Feedback.ActiveState = "Incorrect"
>         Else  ' No Response
>             Feedback.ActiveState = "NoResponse"
>         End If
>     End If
>
>Also, make sure that you set PreRelease on 
>Feedback to 0 (instead of the new default of 
>"(same as duration)"), or else this will not 
>work; or, add code to this inline to ensure that 
>it waits for a response (which I think harder to do).
>
>-----
>David McFarlane
>E-Prime training 
>online:  http://psychology.msu.edu/Workshops_Courses/eprime.aspx
>Twitter:  @EPrimeMaster (twitter.com/EPrimeMaster)
>
>
>At 4/20/2012 11:10 AM Friday, you wrote:
>>Güzin,
>>
>>Well, I hate to encourage people to send me 
>>their files, much less encourage them to attach 
>>files for everyone on the Group, but I have to 
>>admit that this puzzle intrigued me, and the 
>>example was well constructed.  So...
>>
>>Sigh.  Why do I keep having to do PST's 
>>debugging for them?  Yes, you have uncovered an 
>>honest-to-goodness bug.  But first, let me 
>>explicate a little more of the misbehavior in your example.
>>
>>First, your car.jpg image never appeared at 
>>all.  That was just because your image did not 
>>properly fit in the frame of the ImageDisplay 
>>sub-object on your slide.  You can fix that in 
>>a variety of ways, and that is *not* a bug in EP.
>>
>>Next, not only does EP fail to show an image 
>>for the first incorrect response, but after 
>>that, any time you enter a correct response, 
>>the *next* incorrect response will use the 
>>image belonging to the previous *correct* response!
>>
>>How?  This all becomes clear when you look 
>>through the generated E-Basic code.  The code 
>>first loads an image based on the *current* 
>>ActiveState of the FeedbackDisplay; but it does 
>>not change the ActiveState to Correct, 
>>Incorrect, etc., until later!  It is just that simple.
>>
>>Note that you used EP2.0.10.182, the latest 
>>release of EP.  By contrast, both good-old 
>>EP1.2, and EP2.0.8.90 (the previous public 
>>release), generate FeedbackDisplay code in the 
>>correct order and do not have this bug.
>>
>>Thank you for bringing this bug to public 
>>attention.  You should submit this to PST Web 
>>Support so that they may take action to fix 
>>this; I will do the same.  Until then, despite 
>>the real advances of EP2.0.10.182, users may 
>>want to hold off on upgrading and stick with 
>>EP2.0.8.90, as this seems like a fairly egregious programming mistake.
>>
>>-----
>>David McFarlane
>>E-Prime training 
>>online:  http://psychology.msu.edu/Workshops_Courses/eprime.aspx
>>Twitter:  @EPrimeMaster (twitter.com/EPrimeMaster)
>>
>>
>>At 4/20/2012 03:04 AM Friday, you wrote:
>>>I have already searched for  that problem in the pst forum.
>>>I have found a similiar problem, but there was 
>>>not a reply or solution for that problem. You can see the thread below:
>>>
>>><http://dedicated.pstnet.com/forum/Topic5723-23-1.aspx?Highlight=feedback>http://dedicated.pstnet.com/forum/Topic5723-23-1.aspx?Highlight=feedback
>>>
>>>Since anybody wrote an answer for that problem 
>>>in the forum I decided asking to this group.
>>>
>>>I tried to change filename, attribute name, 
>>>image type (as bmp, png jpg) etc. but problem is stil continuing.
>>>I am sending an example of my problem at the 
>>>attachment. This is not my actual experiment, 
>>>only a small example to show my problem.
>>>
>>>On 19 Nisan, 19:49, David Vinson 
>>><<mailto:d.vin... at ucl.ac.uk>d.vin... at ucl.ac.uk> wrote:
>>> > Hi Güzin,
>>> >
>>> > Your problem sounds like a tricky one 
>>> indeed.  If I understand your message, on the 
>>> first incorrect trial the "Incorrect" 
>>> feedback screen is displayed, but without the 
>>> desired image. On all other trials the feedback is displayed correctly.
>>> >
>>> > At first I thought there could be a problem 
>>> with the assignment of a filename via the FB 
>>> attribute. But this should produce an error 
>>> if a filename is not assigned to an image when it is meant to be displayed.
>>> >
>>> > One question is whether the "incorrect" 
>>> feedback slide is actually being displayed on 
>>> the problematic trial. That is, is the 
>>> incorrect feedback display occurring but 
>>> failing to load the desired image?  Or is the 
>>> incorrect feedback failing to display at 
>>> all?  this is easy enough to test, just add 
>>> some text on the "Incorrect" slide in addition to your desired image.
>>> >
>>> > Another angle would be to try and add a 
>>> brief interval (e.g. Wait 100) between your 
>>> response object and its feedback screen. This 
>>> might be superstitious behaviour on my part 
>>> but sometimes I find this sorts out "unusual" behavior with feedback displays.
>>> >
>>> > Please report back and let us know how it turns out.
>>> > -dv
>>> >
>>> > On 19/04/2012 10:28, SGuzin wrote:
>>> > > I have a problem with feedback display. In incorrect state of feedback
>>> > > slide I put an image display which gets the images from the FB
>>> > > attribute(fb1.jpg, fb2.jpg, fb3.jpg, fb4.jpg) in the list. When the
>>> > > participant’s answer is incorrect for the first time, feedback screen
>>> > > comes as blank (I mean image does not appear). But for the second time
>>> > > for rest of the answers image appears on the screen. I have randomized
>>> > > question to see whether is there a problem with images. But always
>>> > > only first time image does not appears not being dependent on which
>>> > > image.
>>> > > I tried to put image display on correct state, but there were no
>>> > > problem.
>>> > > I do not understand why the incorrect feedback comes blank for the
>>> > > first wrong answer and not for the others.
>>> > > I will be thankfull if you can  help me whith this.
>>> > > Güzin

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