This study, conducted by The Gallup Organization, provides a description of the frequency and types of suspected misconduct which 2212 scientists observed in three academic years (2003-2005). The study indicates that a substantial amount of suspected research misconduct is not being reported.  Twenty percent of the scientists wrote that the most important way to promote reporting research misconduct is the degree of protection offered to whistleblowers.  An article has been submitted to a peer reviewed journal. 

Final Report: Observing and Reporting Suspected Misconduct in Biomedical Research
  » Final report (PDF)
  » Commentary (PDF)
  » Questionnaire (PDF)
  » Codebook (PDF)
  » Data File (Read Only) (SAV) (SPSS data file. Right click and "Save as" on to your computer)