OCD theory A and B worksheet

What is the theory behind this OCD theory A and B worksheet?

People with OCD strongly believe that their compulsive actions are preventing them from real harm. This is Theory A. The alternative, Theory B, is that there is in fact no real danger hence nothing to worry about. CBT can help them realize their worries are baseless by gathering evidence to disprove Theory A and eventually accept Theory B. 

How will the worksheet help?

The purpose of this worksheet is to gather information about the clients threatening beliefs and the proceeding behaviors. It also prompts them to think of another way to look at their belief. This information can be used as discussion points in the next session to prepare the client to test both theories as the next step. 

How to use the worksheet?

During therapy, reframe the client’s belief as a ‘theory’ that needs supportive evidence to be true.  Use the worksheet as a homework assignment after initial discussion to begin the process of challenging their long-held beliefs.

OCD theory A and B worksheet 

 It is very common for one thing to be explained through multiple perspectives.  What if you were to consider an alternative way of explaining your worry?

Your TheoryAn alternative theory
What worries you?

What could be an alternate explanation for your worry?
What evidence do you have to support it?

Even if you don’t believe it, what evidence can support it?
What do you have to do to stop it from coming true?

What will happen if it comes true?
How many times has this come true?

If this is true, how will it affect your life in general? 


Enright, S. (2008). Managing Obsessive-Compulsive Disorder. Wokingham Digital Solutions. https://cypf.berkshirehealthcare.nhs.uk/media/168487/managing-ocd.pdf

You can download this worksheet here.

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