How do I display a screen only when the answer is correct in a Triangle test or Tetrad test

How do I display a screen only when the answer is correct in a Triangle test or Tetrad test

During a Triangle test a panellist is presented with three samples of which two are equal and one if different. A panellist must point out the odd sample. 
In a Triangle test you can display a screen only when the correct answer is given by a panellist. 

Create a triangle test by selecting triangle template.

After selecting ''Create Project", you will see following options

Click on project selector encircled in the picture above. When you click on it following window will appear.  You will find triangle template under "Discrimination" folder.

Add an additional screen in design section of the questionnaire and name it correct answer. In that screen, click on ''Add Question" tab and select general questions > general instruction. 

In that screen, set the condition as difference equals 1 and type a text "You provided correct answer'' in project workspace as shown below

When a panellist provides a correct answer then the above text will appear.

Create another additional screen with name incorrect answer and set a condition difference equals 0. You can type text as "You provided incorrect answer"

Panellists will receive the text of incorrect answer when they provide wrong answer.
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