Abstract
With the development of the Internet, consumers have had an opportunity to check product information easily through E-Commerce. Product reviews used in the process of purchasing goods are based on user experience, allowing consumers to engage as producers of information as well as refer to information. This can be a way to increase the efficiency of purchasing decisions from the perspective of consumers, and from the seller's point of view, it can help develop products and strengthen their competitiveness. However, it takes a lot of time and effort to understand the overall assessment and assessment dimensions of the products that I think are important in reading the vast amount of product reviews offered by E-Commerce for the products consumers want to compare. This is because product reviews are unstructured information and it is difficult to read sentiment of reviews and assessment dimension immediately. For example, consumers who want to purchase a laptop would like to check the assessment of comparative products at each dimension, such as performance, weight, delivery, speed, and design. Therefore, in this paper, we would like to propose a method to automatically generate multi-dimensional product assessment scores in product reviews that we would like to compare. The methods presented in this study consist largely of two phases. One is the pre-preparation phase and the second is the individual product scoring phase. In the pre-preparation phase, a dimensioned classification model and a sentiment analysis model are created based on a review of the large category product group review. By combining word embedding and association analysis, the dimensioned classification model complements the limitation that word embedding methods for finding relevance between dimensions and words in existing studies see only the distance of words in sentences. Sentiment analysis models generate CNN models by organizing learning data tagged with positives and negatives on a phrase unit for accurate polarity detection. Through this, the individual product scoring phase applies the models pre-prepared for the phrase unit review. Multi-dimensional assessment scores can be obtained by aggregating them by assessment dimension according to the proportion of reviews organized like this, which are grouped among those that are judged to describe a specific dimension for each phrase. In the experiment of this paper, approximately 260,000 reviews of the large category product group are collected to form a dimensioned classification model and a sentiment analysis model. In addition, reviews of the laptops of S and L companies selling at E-Commerce are collected and used as experimental data, respectively. The dimensioned classification model classified individual product reviews broken down into phrases into six assessment dimensions and combined the existing word embedding method with an association analysis indicating frequency between words and dimensions. As a result of combining word embedding and association analysis, the accuracy of the model increased by 13.7%. The sentiment analysis models could be seen to closely analyze the assessment when they were taught in a phrase unit rather than in sentences. As a result, it was confirmed that the accuracy was 29.4% higher than the sentence-based model. Through this study, both sellers and consumers can expect efficient decision making in purchasing and product development, given that they can make multi-dimensional comparisons of products. In addition, text reviews, which are unstructured data, were transformed into objective values such as frequency and morpheme, and they were analysed together using word embedding and association analysis to improve the objectivity aspects of more precise multi-dimensional analysis and research. This will be an attractive analysis model in terms of not only enabling more effective service deployment during the evolving E-Commerce market and fierce competition, but also satisfying both customers.
인터넷의 발달로, 소비자들은 이커머스에서 손쉽게 상품 정보를 확인한다. 이때 활용되는 상품 리뷰는 사용자 경험을 토대로 작성되어 구매의사결정의 효율성을 높일 뿐만 아니라 상품 개발에 도움을 주기도 한다. 하지만, 방대한 양의 상품 리뷰에서 관심있는 평가차원의 세부내용을 파악하는 데에는 많은 시간과 노력이 소비된다. 예를 들어, 노트북을 구매하려는 소비자들은 성능, 무게, 디자인과 같은 평가차원에 대해 각 차원별로 비교 상품의 평가를 확인하고자 한다. 따라서 본 논문에서는 상품 리뷰에서 다차원 상품평가 점수를 자동적으로 생성하는 방안을 제안하고자 한다. 본 연구에서 제시하는 방안은 크게 2단계로 구성된다. 사전준비 단계와 개별상품평가 단계로, 대분류 상품군 리뷰를 토대로 사전에 생성된 차원분류모델과 감성분석모델이 개별상품의 리뷰를 분석하게 된다. 차원분류모델은 워드임베딩과 연관분석을 결합함으로써 기존 연구에서 차원과 단어들의 관련성을 찾기 위한 워드임베딩 방식이 문장 내 단어의 위치만을 본다는 한계를 보완한다. 감성분석모델은 정확한 극성 판단을 위해 구(phrase) 단위로 긍부정이 태깅된 학습데이터를 구성하여 CNN 모델을 생성한다. 이를 통해, 개별상품평가 단계에서는 구 단위의 리뷰에 준비된 모델들을 적용하고 평가차원별로 종합함으로써 다차원 평가점수를 얻을 수 있다. 본 논문의 실험에서는 대분류 상품군 리뷰 약 260,000건으로 평가모델을 구성하고, S사와 L사의 노트북 리뷰 각 1,011건과 1,062건을 실험데이터로 활용한다. 차원분류모델은 구로 분해한 개별상품 리뷰를 6개 평가차원으로 분류했고, 기존 워드임베딩 방식보다 연관분석을 결합한 모델의 정확도가 13.7% 증가했음을 볼 수 있었다. 감성분석모델은 문장보다 구 단위로 학습한 모델이 평가차원을 면밀히 분석함으로써 29.4% 더 높은 정확도를 보임을 확인했다. 본 연구를 통해 판매자, 소비자 모두가 상품의 다차원적 비교가 가능하다는 점에서 구매 및 상품 개발에 효율적인 의사결정을 기대할 수 있다.
