Most of the research I've come across speaks to the compromised independence of auditors as a result of offering and delivering non-audit services to their clients, in addition to their performance of the annual financial audit. I am, however, looking for other factors that may call auditor professional skepticism into questions, such as:
1) lack of a defined method to document professional skepticism, but in particular,
2) lack of validation protocols to test the veracity of the information they receive anecdotally from executives and senior management in the interview/discussion process of the annual audit.
Thanks in advance!