Editing Optical mark recognition (section)

===Disadvantages===
There are also some disadvantages and limitations to OMR. If the user wants to gather large amounts of text, then OMR complicates the data collection.<ref>Green, 2000 {{who|date=July 2015}}</ref> There is also the possibility of missing data in the scanning process, and incorrectly or unnumbered pages can lead to their being scanned in the wrong order. Also, unless safeguards are in place, a page could be rescanned, providing duplicate data and skewing the data.<ref name="Bergeron, 1998"/>

As a result of the widespread adoption and ease of use of OMR, [[Standardized test|standardized examinations]] can consist primarily of multiple-choice questions, changing the nature of what is being tested.