An Originality Report might show a high similarity index for a number of reasons. Depending on the reason, you may or may not be able to ‘fix’ the problem. Click the description (below) that best describes your situation to learn how to solve your problem.
1、I have lots of very small matches (5-8 words) adding up to a high similarity index
When creating the assignment, your lecturer is able to tell Turnitin to ignore small matches; if this setting is not enabled you might see a number of small text matches that are very general and not matched to specific sources. Small matches commonly occur when you use specific terms with long names (e.g. Department of Education, Employment and Workplace Relations). Lots of minor text matching can also occur when large student cohorts enrolled in the same unit are provided with the resources to be used in an assignment. There are only so many ways to restate this information! In this scenario, the last work submitted through Turnitin may have many 1% matches with all other submitted work resulting in a high overall similarity index. You can't fix or change this, just understand that it can happen and don't panic when it does!
2、I have lots of matches to entries in the reference list
This problem relates to the way your assessor set up the Turnitin drop-box. There is an option to exclude bibliographies, however some academics may not choose this option or have accidentally switched this off. Turnitin also does not recognise every reference format, and might not identify the reference list. These matches can artificially increase your similarity index,and although you can't fix or change this situation, you can toggle the setting on/off on your originality report to understand how and why it happened. if you feel these matches are adversely affecting your originality percentage you should discuss this with your lecturer.
3、Turnitin is saying that I have plagiarised a dodgy website but I didn't use it!
Turnitin doesn't ever say that you plagiarised anything! It just identifies that your text is similar to that in another source. Turnitin compares your submitted text with the material from several locations including its repository, books and journals, and across the web. This can result in matches from any of these sources - including other students’ assignments and dodgy websites. The fact that it matched your text to this website doesn’t imply that you used it - simply that your text matches it. The website could have plagiarised someone else’s work!
4、The similarity index in my originality report is 0% - what have I done wrong?
It is possible to obtain a similarity of 0% through writing original work. A low similarity relates to the way your assessor set up the Turnitin drop-box. There are options to exclude bibliographies and small matches (5-8 words long) which can lead to a legitimate 0% similarity in your report. You haven't done anything wrong!