手法を比較

	暗黙的感情分析	感情分析
分野	テキストマイニング	テキストマイニング
系統	Process / pipeline	Process / pipeline
提唱年	2016 (aspect-level formulation); LLM-based reasoning formulation c. 2023	—
提唱者	Rooted in aspect-level and deep-memory sentiment research; Tang et al. (2016) and Zhao et al. (2023) are key references	—
種類	NLP text-classification task	NLP text-classification task
原典	Zhao, W. et al. (2023). Is ChatGPT a Good Sentiment Reasoner? A Preliminary Study. arXiv preprint.	Pang, B. & Lee, L. (2008). Opinion Mining and Sentiment Analysis. Foundations and Trends in Information Retrieval, 2(1-2), 1-135.
別名	Örtük Duygu Analizi (Implicit Sentiment), implicit opinion mining, indirect sentiment detection	opinion mining, polarity detection, duygu analizi
関連	3	3
概要	Implicit sentiment analysis detects indirect, context-dependent sentiment in text where no explicit opinion word is present — such as irony, metaphor, or understated criticism. Unlike standard sentiment analysis, which relies on surface-level polarity signals, this method interprets meaning from surrounding context, pragmatic cues, and world knowledge. It is typically addressed using large language models or fine-tuned transformers, drawing on work by Tang et al. (2016) on deep-memory aspect-level classification and Zhao et al. (2023) on LLM-based sentiment reasoning.	Sentiment analysis, also called opinion mining, is a natural-language-processing task that detects the emotional tone of text — typically classifying it as positive, negative, or neutral. It turns unstructured opinion text into structured, quantifiable polarity signals using one of three families of approaches: sentiment lexicons, trained machine-learning classifiers, or pretrained transformer models.