Peters et al. Delusions Inventory, PDI-21

Author: E. Peters et al. (2004)

Instruction

Please answer the following questions as honestly as you can.

There are no right or wrong answers, and there are no trick questions.

Please note that we are NOT interested in experiences people may have had when under the influence of drugs.


For the questions you answer YES to, we are interested in:

(a) How distressing these beliefs or experiences are: from 1 (Not at all distressing) to 5 (Very distressing)

(b) How often you think about them: from 1 (Hardly ever think about it) to 5 (Think about it all the time)

(c) How true you believe them to be: from 1 (Don't believe it's true) to 5 (Believe it is absolutely true)

Select the number which corresponds most closely to how distressing this belief is, how often you think about it, and how much you believe that it is true.


If you answer NO, please left all the numbers at zero positions and continue.