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Abnormality of a Difference

This page calculates the Abnormality or rarity of a difference
between two scores from two different tests (or scales)
when you know the correlation between the two tests


Test 1 Score    Mean    SD   
Test 2 Score    Mean    SD   

Correlation between the two tests


  

Optionally calculate difference
of Test 2 score with predicted
(from Test1 score) Test 2 score

  
  


Show Calculations in results
  
  




  
      
Calculator Disclaimer: This calculator has been developed for educational purposes, so that psychologists can learn to apply psychometric formula to clinical situations. It has been tested and validated with data from examples used to teach psychometrics on this site. It has not been tested or validated with a wide range of clinical data. Therefore we cannot offer any guarantee that the results of any calculation applied to clinical data is appropriate, accurate or valid.

 
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