Extraction of Aspect Categories for Sentiment Analysis towards Technical and Vocational Education and Training (TVET) in Malaysia using Topic Modelling Approach
This study highlights the neccesity of the analyses on public opinion through more transparent approach in order to observe the public perception towards technical and vocational education and training (TVET) in Malaysia. Aspect-based sentiment analysis (ABSA) enables the identification the aspect or features that reflect positive and negative sentiments in sentences. However, one of the challenges in ABSA is the extraction of aspect from the dataset. In this study, topic modelling is used to identify the aspect words from tweets related to TVET in Malaysia. One of the topic model that is proven useful in extracting topics from corpus of lesser known domain is Latent Dirichlet Allocation (LDA). LDA extracted aspects terms were compared with manually labeled aspect terms. The study shows means of accuracy at 0.96 while the means of precision is acceptable at 0.70 respectively after applying LDA in extracting the aspec categories. It is hope that by harvesting opinions from social media will enable the discovery of the most frequent aspects about TVET in Malaysia that often mentioned by the public. This research is hoping to contribute towards the improvisation of Malaysia’s TVET in the future.