Switching between 2 lists and conditionally skipping trials

[Tronix]

Hi!

 

I’m running into some problems programming an experiment switching randomly 
between 2 lists. I want to present a text, displayed sentence by sentence, 
that contains abnormalities in some, randomly selected sentences. For this, 
I created a program that switches randomly between two nested lists. One 
list contains regular sentences (e.g., “The tree grew.”), the other 
slightly modified versions of the same sentences (e.g., “The tree gfrwr.”). 
Now I don’t want to show any sentence in both the regular and abnormal 
version. To achieve this, I numbered the sentences and basically tried to 
tell e-prime to skip a sentence if a sentence with the same number from the 
other list has already been presented. When I run the program, however, it 
seems to skip all the sentences. I can’t seem to find the mistake. I’d be 
very happy if somebody here could help me with this. 

 

Here is what I did: 

 

1. I created a variable (“Magicnumber “) that’s supposed to keep count of 
the presented trials. In the beginning of the script, I set the value to 1:

c.SetAttrib "Magicnumber", 1

 

2. To update this value, immediately after the sentence display object I 
put an inline object saying: 

c.SetAttrib "Magicnumber" , "Magicnumber" + 1

 

3. In each of the nested lists containing the sentences, I created a 
variable (“Sentencenumber”) containing the numbers 1 to 30 (from first to 
last sentence). 

 

4. I inserted a label object (“Skip”) a bit after the sentence display 
object. 

 

5. In order to skip sentences with sentence numbers already selected from 
the other list, immediately before the sentence display object I inserted 
an inline object saying: 

If c.GetAttrib("Sentencenumber") < "Magicnumber" then

                Goto Skip

End if

 

Does anybody see what I did wrong here? 

Thanks in advance for your help!

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