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研究生:魏晨珊
研究生(外文):Chen-Shan Wei
論文名稱:適用於多領域虛假評論之判斷模型
論文名稱(外文):Devising a cross- domain model to detect deceptive review comments
指導教授:許秉瑜許秉瑜引用關係
學位類別:碩士
校院名稱:國立中央大學
系所名稱:企業管理學系
學門:商業及管理學門
學類:企業管理學類
論文種類:學術論文
論文出版年:2020
畢業學年度:108
語文別:中文
論文頁數:53
中文關鍵詞:判斷虛假評論Stimuli-Organism-Response (S-O-R) 框架word2vec
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網路購物中評論的影響力對消費者與店家銷售策略已經產生巨大影響,其中,正
向的評論會對於消費者有積極的購買行為。因此許多店家為提升銷售量,會徵求許多
寫手編寫正向虛假評論,混淆消費者的資訊推銷產品。目前辨別真假評論的研究中,
若使用語言類別萃取特定評論的特徵,將導致原先表現良好的辨別方法換成另一批資
料測試時,準確率就會大幅下降。
至今相關研究逐漸由單一領域中辨別虛假評論進一步探討跨領域中辨別虛假評
論,例如:Li, Ott, Cardie, and Hovy (2014)、Ren and Ji (2017)、W. Liu, Jing, and Li
(2019)。無論是使用評論之語言特徵或類神經網路等綜合方法建立辨別模型,皆面臨精
準度降低的問題,其中,也並未明確解釋為何字詞可以應用在跨領域的預測上。
本論文使用:Ott et al.(2011)及 Li, Ott, Cardie, and Hovy (2014)所搜集的三個領域
(hotel、restaurant、doctor)真實與虛假評論資料,利用心理學理論,Stimuli Organism
Response (S-O-R)框架為基礎結合 LIWC (Linguistic Inquiry and Word Count),建立一個
跨領使用的分類模型,再加上透過 word2vec 詞向量頻繁特徵建萃取,克服過去論文跨
域辨別精準度大幅降低的狀況。
實驗結果得出若使用方法一,SOR 與評論之特徵權重進行分類演算法計算,表現最
佳的 DNN 方法中準確度達 63.6%。方法二,詞向量頻繁特徵進行分類演算法計算,表
現最佳的 random forest 準確度達 73.75%。
The online reviews not only have huge impact on consumer shopping behavior but also
online stores’ marketing strategy. Positive reviews will have positive influence for consumer’s
buying decision. Therefore, some sellers want to boost their sales volume. They will hire
spammers to write undeserving positive reviews to promote their products. Currently, some of
the researches related to detection of fake reviews based on the text feature, the model will
reach to high accuracy. However, the same model test on the other dataset the accuracy
decrease sharply.
Relevant researches have gradually explored the identification of false reviews through
field. For example, Li, Ott, Cardie, and Hovy (2014);Ren and Ji (2017)、W. Liu, Jing, and
Li (2019). Whether the model built using comprehensive methods such as text features or
neural networks, encountering the decreasing of accuracy. On the other hand, the method
didn’t explain why the model can be applied to cross-domain predictions.
In our research, we using the fake reviews and truthful reviews from Ott et al.(2011) and
Li, Ott, Cardie, and Hovy (2014) in the three domain (hotel, restaurant, doctor). The cross
domain detect model based on Stimuli Organism Response (S-O-R) combine LIWC
(Linguistic Inquiry and Word Count), add word2vec quantization feature, overcoming the
decreasing accuracy situation.
According to the research result, in the method one SOR calculation of feature weight of
reviews, the DNN classification algorithm accuracy is 63.6%. In the method two, calculation
of frequent features of word vectors, the random forest classification algorithm accuracy is
73.75%.
目錄
內容
中文摘要 ................................................................. i
Abstract.................................................................. ii
目錄 ................................................................... iii
圖目錄 ................................................................... v
表目錄 .................................................................. vi
一、 緒論 ................................................................ 1
1-1 研究背景與動機 ................................................... 1
1-2 研究方法與目的 ................................................... 2
1-3 效益與貢獻 ....................................................... 4
1-4 研究架構 ......................................................... 5
二、 文獻探討 ............................................................ 6
2-1 線上評論之相關研究 ............................................... 6
2-2 辨別虛假評論之相關研究 ........................................... 7
2-3 Stimulus-Organism-Response(S-O-R)框架 ........................... 11
三、 研究方法與設計 ..................................................... 13
3-1 研究架構與步驟 .................................................. 13
3-2 SOR 類別篩選方法 ................................................. 15
3-3 方法一:SOR 與評論之特徵權重 ..................................... 16
3-4 方法二:詞向量頻繁特徵 .......................................... 16
四、 研究實驗 ........................................................... 18
4-1 實驗資料 ........................................................ 18
4-1-1 資料預處理 ................................................ 19
4-2 SOR 類別資料 ..................................................... 19
iv

4-3 評論與 SOR 詞特徵權重 ............................................ 20
4-4 實驗一:SOR 與評論之特徵權重 ..................................... 25
4-5 實驗二:詞向量頻繁特徵 .......................................... 26
五、 結論與建議 ......................................................... 32
5-1 研究結果 ....................................................... 32
5-2 未來建議 ....................................................... 32
參考文獻 ................................................................ 33
附錄一 .................................................................. 37
附錄二 .................................................................. 38
附錄三 .................................................................. 41
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