Open Plagiarism Detection Starter File. Click "Run".
Reviewing simple-similarity
1 Type doc-a into the Interactions Area, then hit "Enter". What appears?
2 Type doc-b into the Interactions Area, then hit "Enter". What appears?
3 If we compare these two documents using our simple-equality function, what do you predict the outcome will be… and why?
4 Type simple-equality(doc-a, doc-b). What is the output?
Testing string-to-bag and bag-equality
5 This starter file uses the function string-to-bag, which converts a string into a bag of words. Type string-to-bag(doc-a) in the Interactions Area and hit "Enter". What is the output?
6 Type string-to-bag(doc-b) in the Interactions Area and hit "Enter". What do you observe?
7 The function bag-equality checks if two different bags of words are identical. What do you predict the output will be when you use doc-a and doc-b as the arguments for bag-equality? Were you correct?
Assessing the model on our elephants texts
8 Use string-to-bag to build one bag of words for the wiki-article, and another for the student-essay. Do the bags of words appear to be identical to you, or not?
9 Our simple-equality function returned false when we compared wiki-article with student-essay, because the two documents are not identical. What do you predict that bag-equality will produce, when we compare wiki-article with student-essay? Why?
10 Use bag-equality to compare wiki-article and student-essay. Was your prediction correct?
Reflect
11 How is the bag-equality plagiarism detector different from our primitive simple-equality plagiarism detector? How is it similar?
These materials were developed partly through support of the National Science Foundation, (awards 1042210, 1535276, 1648684, 1738598, 2031479, and 1501927). 
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