Crossref Similarity Check, previously known as CrossCheck, compares submitted documents against over 160 million articles, books, and web pages to check for plagiarism and originality. It is not intended as a plagiarism detection service, but rather helps editors and publishers identify potential issues of textual overlap. The system has indexed over 49 million publications from Crossref members and 105 million from other partners to form its database. Usage has grown significantly since 2015. Publishers must be Crossref members and submit content that is indexed to utilize the service. It provides similarity reports to help editors evaluate matches and potential cases of plagiarism. Feedback indicates it is an effective tool, but some users feel aspects like comparing figures/tables or two documents

1. Checking for originality
through Similarity
Check

2. What’s in a name?
• CrossCheck —> Crossref Similarity Check
• More cohesive approach to naming and branding: the aim is to
stem confusion and provide clear messages and useful resources
• Across whole Crossref portfolio
• See blog: http://blog.crossref.org/2016/04/brand-guide-names-
logos.html
• So while it may be a bit of a pain short term it will be worth it!

3. Similarity Check Database
• Not plagiarism detection
• What are papers checked against?
• 49 million items from over 800 Crossref member
publishers
• Actively working to improve the speed and
comprehensiveness of indexing
• 105 million items from other content partners like
Pearson, McGraw Hill, Cengage, EBSCOHost
• Over 60 billion web pages archived back nearly a decade

5. 0
50000
100000
150000
200000
250000
300000
350000
400000
M
ay-15
Jun-15
Jul-15 Aug-15
Sep-15
Oct-15 Nov-15 Dec-15
Jan-16
Feb-16 M
ar-16
Apr-16
Documents Checked

6. Using the Service
• Must be registering content and assigning DOIs
• Content must be indexed to be add to iThenticate
database
• Notified when new content added
• Integrated with a number of submission systems
• Hosting provider can enabled indexing for content

7. Using the Service
• Upload document
• a similarity report is produced
• compare side-by-side
• editor makes a judgment of whether there is a case
of plagiarism or legitimate duplication

8. 76%
2%
12%
10%
Have you detected any plagiarised content using
CrossCheck?
Yes We use CrossCheck to check concerns already raised by editors Not sure No
Is it working?

9. How are people using it?
Publishers putting time and effort into their plagiarism
policies
• Resources (staff & time)
• Cost
• Workflow
• What will you look for & how will you look for it?
• Education
• Follow-up actions

11. Education > Punishment

12. Cost
• administrative fee = 20% of Crossref member fee
• per document checking fee
• more cost effective than joining iThenticate directly

13. Developing the Service
28%$
17%$
14%$
10%$
8%$
7%$
6%$
6%$
4%$
Do#you#feel#any#aspects#of#the#iThen2cate#tool#could#be#
improved?##
Ability$to$compare$figures,$tables$or$equa=ons$ Ability$to$check$two$documents$against$each$other$
More$comprehensive$database$to$search$against$ Translated$matching$of$text$
Clearer$similarity$reports$ Faster$genera=on$of$reports$
BeKer$integra=on$with$online$submission$and$peer$review$systems$ Other$
BeKer$publisherMlevel$repor=ng$

14. Questions?