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Understanding a Turnitin Originality Report
How it works and what to expect
If you use the Turnitin Assignment tool you will encounter an Originality Report.
For a more in depth look at the Originality Report please see this video resource.
Originality Report
Introduction
0:07 hello and welcome to this video looking
0:10 at the Turnitin originality report
0:12 Turnitin is a specialized search engine
0:15 and data matching tool that is used by
0:17 many schools and universities to detect
0:19 plagiarism or copying by matching blocks
0:21 of text to previously published
0:23 materials plagiarism is a serious
0:26 offense and is treated by the University
0:28 of Portsmouth as such however it is part
0:30 of this staffs responsibility to educate
0:32 students in good practices Turnitin can
0:36 help with this and indeed its primary
0:37 use in the university is to help you
0:39 develop good practice incorrectly using
0:42 citations quotations and references in
0:45 order to take full advantage of Turnitin
0:47 you need to understand what the
0:49 originality report is telling you and
0:51 what the similarity index indicates once
Understanding the Originality Report
0:54 you have logged into Moodle go to the
0:55 unit where you submitted the assignment
0:56 and go to the Dropbox where you handed
0:58 the work in once inside it will be
1:01 broken down into the parts you need to
1:03 submit and you'll be able to click on
1:05 the similarity score once you've clicked
1:08 the percentage it will load up the
1:10 Turnitin document viewer you will see in
1:12 the right-hand menu a blue section and a
1:14 red section the number in the red
1:17 section is your originality score in
1:19 this case it is 34% this is the amount
Understanding the Match Overview
1:22 of your work that overlaps with other
1:24 work that has been submitted to Turnitin
1:26 or created and can be found online it is
1:29 broken down into coloured chunks and
1:30 this shows you where the work overlaps
1:32 with other content you can also see this
1:35 in the match overview on the right-hand
1:37 side of the feedback studio interface so
1:40 the top match is at 6% and there are a
1:43 few at one or two percent if I scroll
1:45 through the document you can see there
1:47 are different sections highlighted in
1:49 multiple colors show me where they are
1:51 some work may be quoted and given a
1:54 citation if you click the filter button
1:56 you can choose to exclude quoted
1:58 materials as well as the bibliography or
2:01 references section by clicking on
2:03 exclude the bibliography it will exclude
2:05 anything under the referencing title in
2:07 the document this has now dropped the
2:11 percentage down to 32% you can also see
2:16 there are smaller matches of around one
2:17 and two percent some may be getting two
2:20 three and four percent
2:21 and these can also occur because of
2:23 common terms and phrases that used
2:25 within the subject you are writing about
2:27 by excluding maybe three or four percent
2:29 matches it will help to reduce your
2:31 similarity score and to do that click on
2:33 the filter section choose the percentage
2:35 you wish to exclude by typing in that
2:37 figure and when you've done this
2:38 remember to click apply changes at the
2:40 bottom and then it should exclude those
2:43 one and two percent and possibly three
2:45 and four percent matches an academic
2:47 will also be able to change his
2:49 percentage to fit their criteria of
2:50 plagiarism
2:51 you can still see there are matches and
2:53 this could be because of common terms
2:54 that are being picked up if you click on
2:57 the arrow you can see the whole section
2:59 of work and where it is being taken from
3:01 you can see there is an issue here that
3:03 the work is matching other work may be
3:05 slightly more than it should be if you
3:07 click on the full source view you will
3:09 see the full source text window open on
3:11 the right-hand side showing you where
3:13 all the areas that you're getting the
3:14 matches are from again you can see where
3:18 the match is coming from and if it looks
3:19 like this paragraph has been copied and
3:21 pasted in from an external source it is
3:23 not good academic practice you may want
3:26 to revisit this and change it into your
3:27 own words bearing in mind you should not
3:30 use quotation marks or citations around
3:32 large chunks of text as all you are then
3:34 doing is presenting other people's work
3:36 as your own which again is not good
3:38 academic practice you would need to take
3:41 the paragraph out using only a few
3:42 quotations and citations and rewriting
3:44 it in your own words looking at the all
3:47 sources tab you are able to see where a
3:49 match has been broken down how much is
3:51 copied from multiple sources this will
3:54 help you work out where it has been
3:56 taken from and how often it has been
3:57 used looking at the other large
4:00 percentage overlaps they look like they
4:02 have been directly copied from the
4:03 internet and possibly other sources
4:05 again clicking on the arrow you are able
4:08 to see where all of these materials have
4:09 come from it is a very long paragraph
4:12 that has been copied and pasted exactly
4:14 which you would then need to remove
4:16 rewrite and use appropriate quotations
4:18 and citations and of course and in the
4:21 correct references at the end of your
4:23 work by removing the two larger text
4:25 sections that have been copied the
4:27 percentage would be a much lower and
4:29 much more acceptable score a point of
4:32 note however is that it would not be
4:33 acceptable to put a
4:35 large chunk of text in quotation marks
4:36 and just give it a reference this is
4:39 taking the work of others and not
4:40 putting in much of your own work this
4:43 could result in you beginning a much
4:44 lower mark by the member of staff who is
4:46 grading your work another point to note
4:49 is there's no set figure in the
4:51 university regulations that constitutes
4:53 plagiarism the regulations simply state
4:56 a substantial amount and the
4:58 interpretation of this would be given by
5:00 the member of staff setting and then
5:02 marking the work if you have any doubt
5:05 you would need to check that with the
5:06 member of staff you also do not need to
5:09 get a score of 0% to avoid being accused
5:12 of plagiarism you will have small
5:14 fragments and phrases that will always
5:16 overlap for instance when using common
5:18 terminology if you ever unsure please do
5:21 again check with the member of staff who
5:23 is setting the work thank you very much
5:25 for watching this particular video
Turnitin uses a text matching algorithm to report a Similarity Index out of 100, which represents the percentage of text that it has matched to other sources. The score itself is not particularly meaningful as whilst plagiarism is more likely to have occurred in a paper that has a high Similarity Score this does not always follow.
Popular topics will generally have higher matches as there will be more material in Turnitin’s database to search against. When reviewing your Originality Report an academic will look at where the matching occurs, how long each match is, and whether and how you have cited your sources. For example, if entire sentences or paragraphs match other sources without citation this is an indication that plagiarism might have occurred and is worthy of further investigation. When reviewing a lab report it might be reasonable to expect the introduction, hypothesis and method to be similar to other papers, but we would hope for less matching in the final conclusion.
If you have not deliberately plagiarised then you have nothing to worry about. However, if you do have a high match it is probably worth speaking to your lecturer and revisiting guidance on how to reference correctly.
The Library provides extensive referencing support via their Referencing Pages. The Academic Skills (ASK) Unit will also be able to offer support in this area.