Natural Language Processing for Plagiarism Checker

September 2nd, 2020

Reading time about 13 min

What Does Natural Language Processing Mean?

Natural language processing (NLP) is a machine translation technique. NLP translates sentences into another logically processed form, and a computer can easily derive its meaning. The NLP process to extract the data is a complicated procedure. Semantic, Lexical, and Syntactic analysis is the applied form of NLP processes. 

Natural language processing (NLP) is a technique to translate sentences into another logically processed form, and the computer can easily derive its meaning
  • Plagiarism detection based on Semantic Analysis: In this process, the artificial intelligence tool parses the sentences into words to detect plagiarism between two or more words. It reflects the similarity between the compared words. The smaller the value, it is very likely that the words are more similar. 
  • Lexical Analysis: This algorithm is generally used to detect the plagiarized style of writing in any sentence. The selected text parses into pieces of words to find out the similarity. The tool points to any flaws in the structure. However, the technique has a drawback in determining plagiarism in short sentences. 
  • Syntactic Analysis: It is also similar to any other NLP technique. First, the sentences get divided into tokens or words. Then the application of the detection takes place through parts of speech tagging or the vocabulary used. Finally, it determines whether the sentences are contextually and grammatically error-free. 

Reasons Behind Improving Online Plagiarism Checker Methodologies

This artificial intelligence (A.I.) tool can check plagiarism by matching the contents of academic papers against billions of web pages. There are multiple research papers and ideas on the internet. Students and academicians lookout for a straightforward approach to emanate improvised ideas. These anti-plagiarism engines generate a detailed report to curtail the extent of plagiarism. 

AI tool can check Plagiarism by matching the contents of academic papers against billions of web pages

Making a Structural Analysis

The machine learning algorithm for structural analysis includes the following things:

  • Top-down Parsing: The algorithm divides sentences into words and paraphrases the noun and verb phrase. 
  • Bottom-up parsing: Here, the parsing starts with the first word and proceeds to the next words to make a tree-like structure. 
  • Depth parsing: Initially, it finds out the basic units before any plagiarism is detected. After that, it moves to the larger areas of the tree.
  • Repeated programming: This method helps to reduce similarities between two or more sentences and prepares the article for an efficient presentation.
  • Dynamic programming: One considers this technique as the partial form of repeated programming parsing.

Though it is impossible to identify every possible error in the copied content, the NLP process executes the work entirely by detecting hidden languages and syntactical errors. It aims to present original content. 

Use of Reinforcement Learning

Reinforcement Learning is deep neural learning to understand the behavioral psychology of software agents. Over some time, the agent adopts a particular behavior to ensure the trial and error method. It improves the chances of getting a cumulative reward for a specific situation. 

Reinforcement Learning is deep neural learning to understand the behavioral psychology of software agents. Over some time, the agent adopts a particular behavior to ensure the trial and error method. It improves the chances of getting a cumulative reward for a specific situation

Reinforcement Learning Is Used for Detecting Copied Content

RL is perfect for natural language processing (NLP) because the system needs to learn a specific behavioral pattern of the trainer. When a classification of text procedure is going on, an agent and environment get created. It helps in classifying various data from different domains. Initially, it uses arbitrary methods. But once the agent receives the result of the stipulated action, it decides the next step for entity recognition. 

Types of Plagiarism and Detection Methods

One can define plagiarism as the theft of intellectual property in academic circles. From merely copying and pasting original content to more elaborate translated and paraphrased writhing, there are varied forms of plagiarism in the fields of writing. 

  • External plagiarism detection: It helps to compare suspicious duplicate content against potential original journals. The plagiarism software searches the nearest neighbor in high dimensional vector space. It allows seeking the nearest sentences for a given query sentence. 
  • Intrinsic plagiarism detection: This process finds out plagiarized passages within a document. It mainly focuses on Parts of Speech and grammar and others. The user receives content with existing flaws. With the advancement of technology, plagiarism checker with natural language processing can well handle the issues. 

How NLP Works to Detect Plagiarism?

Natural Learning Processing plays a decisive role in establishing a link between human language and computer language. On the other hand, deep learning leads to potential outcomes such as one being implemented in the development of the Chatbots. 

The next question arises related to its usage in checking plagiarism. NLP uses algorithms to detect and avoid plagiarism. Then it comes to how the algorithm works to curtail Plagiarism.

There is a straightforward to parse the sentences into tokens or words and process the same into pieces. It follows a very well-known method which is called Latent Semantic Analysis or LSA. 

Functions of LSA in Checking Plagiarism

LSA is a scientific method for NLP based plagiarism checking. It scrutinizes the extent of similarity between two words with the help of cosine values of the vector. It considers the duplication of those words that are in radar of comparison. 

Additionally, it stores a list of similarities for each cluster, holding similarities with the centroid of the group and sentence vector associated with the cluster. The whole process may sound effortless, but it entails a lot of statistical and mathematical calculations. It also involves semantic, lexical, syntactic, and even a much-improved approach of the algorithm with specific emphasis on grammatical errors. 

Other Algorithms of NLP

Besides these, there is a different algorithm in NLP as well, such as Locality Sensitive Hashing, SimHash, and Text Profile Signature. The algorithm uses far better scientific approaches for detecting plagiarism. Nonetheless, the primary method is about breaking and checking sentences with the words, and ultimately, the main objective gets represented in the matter.

One can use NLP as a refinement tool as the entire process separates words. It helps in removing the burden in the data without adding any value in the sentence. 

So, NLP techniques are capable of improving the current plagiarism scenario. Paid or free plagiarism checkers for students can help them in detecting the copied content from the original version. The techniques have shown significant improvement in the performance on top of basic detection models. 

The conclusion is that Natural Language processing will provide more accurate detection methodologies in the future to curb the theft of contents. Thus, it will offer protection to intellectual writing properties in the coming days. Thus, helping the writers, students and the researchers to create high-quality content with ease.

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