I'm looking for some research on how / whether the 'observer effect' and 'observer bias' affects personality questionnaires. I recently completed the 16Personalities test, a series of questions that drops you into a list of 16 personalities and gives a horoscope-like explanation of who you are. I realised that I answered the questions based on my perception of my personality, and not necessarily what I would do. So if I think of myself as an introvert then I'm more likely to answer 'I am highly likely to feel awkward at a party.'
Then I read this article about how narcissists can sometimes masquerade as sensitive introverts - known as covert narcissists. What's to stop a covert narcissist from skewing their 16personalities answers to reflect a more pleasing view of themselves?
I think there is a bias issue with running a questionnaire in which you are both the observer and the subject, observing your own personality and giving responses that fit your perception of yourself. I was wondering whether anyone could point me to articles or research that look deeper into the observer effect in personality questionnaires.
Any help would be great!