This questionnaire is from Jeffrey Young, PhD.  It is known as the Young Schema Questionnaire (Short Form).  The questions came from common themes that he saw across people he and his students saw in their psychotherapy clinic.  Their model focuses not on diagnosis but rather on the destructive messages that people internalize early in life and continue to become common traps that people get into.  

 

I find it helpful to get an idea of the things you are struggling with.  It is a quick straight-forwards assessment.  It’s not meant to diagnose you - it’s way too short for that.  It’s meant to give a direction to our work. 

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Access it here.  Instructions are in the document.