correct response

[Tony Zuccolotto]

Hi,

I would suggest writing some inline script to recode the response at the
end of the trial.  Hard code correct response to something that you
aren't using so it is always coded as inaccurate.   Then keep another
attribute that is a comma separated list of the correct answers.   Look
in the E-Basic help for the Item$() function that retrieves items from a
comma separated list.   The code would be something like the following.

Dim i As Integer
Dim strCorrects As String

strCorrects = c.GetAttrib( "CorrectAnswers" )  ' = "1,2"
For i = 1 To ItemCount( strCorrects )
	If Probe.RESP = Item$( strCorrects, i ) Then
		Probe.ACC = 1
	End If	
Next i

Probe.ACC will automatically be put back in the context at the end of
the trial prior to logging (assuming standard logging is turned on), but
if you need it sooner you should also throw in a 
	c.SetAttrib "Probe.ACC", Probe.ACC
line after the new value is assigned.   If the list is long you might
also want to use a goto to jump out of the loop (or use a Do-Loop Until
construct) so that you don't continue to go through the list after the
correct answer is found.

Regards,
Tony

*** DISCLAIMER: VIEWS EXPRESSED ARE MY OWN AND DO NOT NECESSARILY
REFLECT THOSE OF MY EMPLOYER ***
Anthony P. Zuccolotto
Vice President of Operations
Psychology Software Tools, Inc.
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Email     anthony.zuccolotto at pstnet.com
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> -----Original Message-----
> From: Susan Campbell [mailto:susanc at andrew.cmu.edu]
> Sent: Wednesday, February 20, 2002 2:37 PM
> To: eprime at mail.talkbank.org
> Subject: Re: correct response
> 
> 
> I looked at this, hoping there would be an easy answer (like putting 
> both inputs in the CorrectAnswer column).  Unfortunately, I couldn't 
> find one.  What I ended up doing was creating a seperate input object 
> for each correct answer, and having the allowable in those 
> input objects 
> not include the other correct answer.
> 
> The downside to this is that you would need to specify each correct 
> answer seperately, and specify all of the incorrect responses 
> as well. 
> So, to display something that has two correct answers, "1" 
> and "2" and 
> two incorrect answers, "3" and "4", would take three columns, one for 
> each correct answer and one for all incorrect answers.
> 
> The test script is at 
> http://step.psy.cmu.edu/script_samples/dual_response.zip if 
> you'd like 
> to see if it works for what you're doing.
> 
> Hope this helps,
> Susan Campbell
> STEP Programmer, Carnegie Mellon
> 
> 
> claudia wrote:
> 
> > Hi there, 
> > 
> > for my experiment the participant's response may either be 
> 1 or 2. What 
> > should the correct input into the "CorrectAnswer" column in 
> the List 
> > Object be?
> > 
> > Thanks for your suggestions!
> > 
> 
> 
> 
>