July 2011
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WEB-BASED PLAGIARISM-CHECKING TOOLS TO TEACH PARAPHRASING SKILLS
Heather Torrie

Teaching ESL students to avoid plagiarism is a constant concern in academic writing. As teachers, we often find ourselves struggling to help students properly paraphrase material, that is, change the text sufficiently so as to not plagiarize while preserving the meaning. Fortunately, we are not left without resources. Web-based tools, such as Turnitin (turnitin.com) and SafeAssign (safeassign.com), are becoming more commonly used in mainstream classes to check against plagiarism. In the ESL environment, plagiarism-checking tools can be used in writing classes, not necessarily as policing tools, but as instructional tools to teach appropriate paraphrasing and citation.

HOW THEY WORK

Plagiarism-checking software, which has been around for quite some time, mainly compares a selection of text against a large database of material. Web-based tools utilize a search engine, such as Google, to find matching text and identify plagiarism. More advanced systems, such as SafeAssign, utilize multiple databases, including published articles and student papers, as well as the Internet. Most tools then produce an originality report, which highlights any instances of possible plagiarism, along with the sources.

Figure 1. Sample matching index from SafeAssign shows the percentage of text that matches online content.


Figure 2. Sample originality report from SafeAssign highlights suspected plagiarism.

These plagiarism-checking tools are not foolproof, however. Because these systems automatically compare text against what is in the database, occasionally they will identify generic phrases as plagiarism. For instance, the phrase “Nuclear power is too risky” may be found in several places on the Internet because it is so general. Thus, some discretion must be taken when viewing these automatically generated reports.

APPLICATION IN THE ESL WRITING CLASS

Although this type of software is often used as a policing tool in the mainstream academic environment, it can be used as a learning tool in an ESL writing class. It is tempting to underline a student’s sentence with the comment “Plagiarism!” or “Too similar.” However, students may not always be able to see how similar their sentence is to the original because paraphrasing often takes more than changing a few words. Having students look at their own writing through plagiarism-checking tools makes the concept less abstract, as they can see their sentence next to the original. This works especially well in a computer lab setting where the analysis process can be modeled on a projector first, and then allowing students to run analyses on their own.

In the sample below using SafeAssign, the student writer can see the highlighted sentence identified as possible plagiarism. A simple click on the highlighted sentence reveals the green box, containing the uploaded sample above the Internet source, along with a matching percentage. The student can then look to see what is similar between the two: in this case, too much similarity in vocabulary and word form.

Figure 3. A close-up look at a sentence flagged by SafeAssign

There are several ways to implement plagiarism-checking tools in a writing class. Besides having students submit and resubmit drafts of complete essays using outside sources, a short paraphrase exercise can give students extensive practice in rewriting a short passage in their own words. Teachers can assign students to paraphrase a block of text from the Internet. Consider using these Web sites for material to paraphrase:


Figure 4. Sample text to use for this activity from About.com video (http://video.about.com/entertaining/How-to-Play-Charades.htm)

Naturally, it is important to select material at the appropriate level so students can grasp the meaning. This may require copying/pasting the passage onto a Word document and deleting portions of the original text that may be too difficult. In addition, using printed material can help prevent students from copying and pasting in this exercise. Here is a set of instructions that could be used in a computer lab activity or for homework:

Step 1. Paraphrase each sentence in the worksheet. Upload into Blackboard SafeAssign.

Step 2. Check the SafeAssign originality report.

Step 3. Look at any of the highlighted sentences and answer these questions:

a) What is the Internet source?

b) What is the matching percentage?

c) How can I change my sentence to make it more original? Use synonyms, change the order of the sentence, or maybe change the verb tense (active to passive).

Step #4 Resubmit with your revisions.

Step #5 Check the SafeAssign originality report again.

It is worth noting that, depending on the system being used, instructors may need to check the settings to make sure they allow for resubmittal of material.

CHOOSING THE RIGHT TOOL

A good resource for playing with various plagiarism-checking tools is www.shambles.net, which lists several free tools, as well as those that cost money. However, free platforms, which often produce a more basic report, can be less effective in helping your students. Two well-known platforms compatible with Blackboard are SafeAssign and Turnitin. Other tools available through monthly subscription include, among many others, CheckforPlagiarism.net and PaperRater().

Whether you choose to go the subscription route or use something free, consider the following: type of databases used to compare content, settings to recognize quotations marks and works-cited material, and the quality of the report. This last consideration is the most important, as the report needs to be helpful and clear to students.

Despite the variation in quality, most plagiarism-checking tools can provide at least some assistance to your students as they work on developing their paraphrasing and citation skills. The key benefit of these tools is that they enable students to visualize their paraphrases, helping them see how similar or different their words are to the original while preserving the meaning. Hopefully, this will minimize the number of vague comments in the margin saying, “Fix plagiarism!”


Heather Torrie teaches academic English in Purdue University Calumet’s intensive English Language Program. Previously, she taught ESL at Brigham Young University in Utah, where she also received her MA TESOL. Her professional interests include skill integration, computer-assisted language learning, and program evaluation. She has also taught for several years in various community ESL programs and supervised a volunteer program in Russia.

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