AFINN

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AFINN
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Category: AFINN
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Sentiment analysis

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AFINN is an affective lexicon by Finn Årup Nielsen. Previous and present versions of the word list are available in a zip file:

http://www2.compute.dtu.dk/pubdb/views/edoc_download.php/6010/zip/imm6010.zip

The word lists are also distributed from within a Python program:

https://github.com/fnielsen/afinn

This Python package also contains a Danish word list.

The word list and its evaluation are described in:

A new ANEW: evaluation of a word list for sentiment analysis in microblogs

Contents

[edit] Relationship to ANEW

Although the title of the associated paper suggests that it is based on the ANEW labeled corpus, it is not. The title is simply a wordpun. It was developed independently of the wordlist, and it is not a revision of it. Compared to ANEW, the AFINN word list has more words and includes obscene words. ANEW on the other hand has (besides valence) arousal and dominance for each word and each word has been labeled by several persons and the mean and standard deviation are given. The AFINN was only labeled by Finn Årup Nielsen. Finn Årup Nielsen was in no way involved in development of ANEW. ANEW was developed by Margaret M. Bradley and Peter J. Lang.

The word list has been used for sentiment analysis and is developed in the Responsible Business in the Blogosphere project.

[edit] Evaluation

  1. Correlation with Alan Mislove's 1000 AMT-labeled tweet post, see A new ANEW: evaluation of a word list for sentiment analysis in microblogs
  2. Correlation with 50 positive and negative manually labeled tweets: 76%-78%, see Analyzing emotion on Twitter for using modeling
  1. Around 0.55 in three-class accuracy on RepLab Twitter data set. However, this is a combined list consisting of AFINN, SentiWordNet and Liu wordlist used as features in a decision tree machine learning classifier.[1]
  2. 0.72-0.77 accuracy in two-class polarity classification with Twitter corpora.[2]
  3. 0.65-0.79 accuracy in two-class subjectivity classification with Twitter corpora.[3]
  4. Performance on product reviews is reported in Data-driven integration of multiple sentiment dictionaries for lexicon-based sentiment classification of product reviews.
  5. 71% and 63% accuracy on two-class polarity classification on Twitter data.[4]
  6. 62.2% accuracy on two-class sentiment analysis of the movie review data set
  7. A comparative study on Twitter sentiment analysis: which features are good? 4 different datasets with AFINN as features in a machine learning classifier: 74-75.2% (SemEval dataset), around 70% (Sanders dataset), 58.7-60.5% (Health Care Reform dataset[5]) and around 62.5-62.8% (Obama-McCain Debate dataset[6]). In this study AFINN was shown to be one of the best features for Twitter sentiment analysis.
  8. How translation alters sentiment, part of an Arabic sentiment analysis system.
  9. Evaluating the effectiveness of hashtags as predictors of the sentiment of tweets shows accuracy results for classifying between sentiment and non-sentiment tweets.
  10. A comparative study of different sentiment lexica for sentiment analysis of tweets evaluates features extracted with AFINN on a data set from the SemEval competition.
  11. An evaluation of machine translation for multilingual sentence-level sentiment analysis evaluates AFINN together with a number of other sentiment analysis methods on multilingual datasets.
  12. Comprehensive study on lexicon-based ensemble classification sentiment analysis evaluates AFINN on various review data sets together with other sentiment analysis methods.
  13. A benchmark comparison of state-of-the-practice sentiment analysis methods is an elaborate evaluation of multiple sentiment analysis methods with multiple datasets. they write: "The top seven methods based on Macro-F1 are SentiStrength, Semantria, AFINN, OpinionLexicon, Umigon, Vader and SO-CAL. This means that these methods produce good results across several datasets for both, 2 and 3-class tasks. These methods would be preferable in situations in which any sort of preliminary evaluation would be performed."
  14. Um benchmark para comparação de métodos para análise de sentimentos

See also AFINN used with Italian translation in IRADABE: adapting english lexicons to the Italian sentiment polarity classification task.

[edit] See also

[edit] Papers

  1. A new ANEW: evaluation of a word list for sentiment analysis in microblogs. Evaluation of the word list with 2477 words.

[edit] Applications of the word list

  1. 2012 presidential elections on Twitter - an analysis of how the US and French election were reflected in tweets
  2. A benchmark comparison of state-of-the-practice sentiment analysis methods
  3. A clustering analysis of tweet length and its relation to sentiment
  4. A comparative study on Twitter sentiment analysis: which features are good?
  5. A comparative study of different sentiment lexica for sentiment analysis of tweets
  6. A constrained multi-view clustering approach to influence role detection
  7. A data-centric framework for development and deployment of Internet of Things applications in clouds
  8. A design proto- pattern for continuously evaluated forecasting in IBM® InfoSphere® Streams
  9. A framework for knowledge derivation incorporating trust and quality of data (2013)
  10. A fine-grained sentiment analysis approach for detecting crisis related microposts (2013)
  11. A hybrid approach for emotion detection in support of affective interaction
  12. A longitudinal study of follow predictors on Twitter (2013)
  13. A novel transit rider satisfaction metric: rider sentiments measured from online social media data
  14. A rule-based approach to implicit emotion detection in text (2015)
  15. A simple and efficient algorithm for lexicon generation inspired by structural balance theory
  16. Acquiring knowledge of affective events from blogs using label propagation (2016)
  17. Aesthetic considerations for automated platformer design (2012)
  18. An empirical, quantitative analysis of the differences between sarcasm and irony (2016)
  19. An evaluation of machine translation for multilingual sentence-level sentiment analysis (2016)
  20. Analyzing and predicting news popularity on Twitter (2015)
  21. Aspect based sentiment analysis (2014, PhD Thesis)
  22. Audience targeting by B-to-B advertisement classification: a neural network approach
  23. Automated fictional ideation via knowledge base manipulation
  24. AUEB: two stage sentiment analysis of social network messages (2014, SemEval)
  25. Bias-aware lexicon-based sentiment analysis
  26. Bimodal feature-based fusion for real-time emotion recognition in a mobile context
  27. BiSAL - a bilingual sentiment analysis lexicon to analyze Dark Web forums for cyber security
  28. BOUNCE: sentiment classification in Twitter using rich feature sets (2013)
  29. Building a Twitter opinion lexicon from automatically-annotated tweets (2016)
  30. Building domain specific sentiment lexicons combining information from many sentiment lexicons and a domain specific corpus
  31. Building sentiment lexicons applying graph theory on information from three Norwegian thesauruses
  32. Can Twitter_Trends predict election results? Evidence from 2014 Indian general election
  33. Capturing place semantics from users' interaction on the geosocial web (2014)
  34. Catching fish in the stream: real time analysis of audience behavior in social media (2013)
  35. Character-to-character sentiment analysis in Shakespeare's plays (2013)
  36. CLaC-SentiPipe: SemEval2015 Subtasks 10 B,E, and Task 11
  37. Citius: a naive-Bayes strategy for sentiment analysis on English tweets (2014)
  38. Combining strengths, emotions and polarities for boosting Twitter sentiment analysis
  39. Combining textual pre-game reports and statistical data for predicting success in the National Hockey League (2014)
  40. Comprehensive study on lexicon-based ensemble classification sentiment analysis (2016)
  41. Constructing sentiment lexicons in Norwegian from a large text corpus
  42. Contextual sentiment analysis using conditional random fields
  43. Contradiction detection between opinions (2013)
  44. Cooperative, dynamic Twitter parsing and visualization for dark network analysis (2013)
  45. Crawling JavaScript websites using WebKit – with application to analysis of hate speech in online discussions (2013)
  46. Crowd sentiment detection during disasters and crises
  47. Cues to deception in social media communications
  48. Data-driven integration of multiple sentiment dictionaries for lexicon-based sentiment classification of product reviews
  49. Detecting predatory behaviour in game chats (2015)
  50. DigitalHealth: exploring users' perspectives through social media analysis (2015)
  51. dispel4py: an agile framework for data-intensive eScience
  52. Discovering content-based behavioral roles in social networks
  53. ELiRF: a support vector machine approach for sentiment analysis tasks in Twitter at SemEval-2015 (2015)
  54. Empirical study of relationship between Twitter mood and stock market from an Indian context (2015)
  55. Enhanced news-reading: interactive and visual integration of social media information
  56. Enhancing lexicon-based review classification by merging and revising sentiment dictionaries
  57. Ensemble learning methods for pay-per-click campaign management (2015)
  58. Ensemble learning techniques for structured and unstructured data (2015, thesis)
  59. Evaluating the effectiveness of hashtags as predictors of the sentiment of tweets
  60. Exploratory search on Twitter utilizing user feedback and multi-perspective microblog analysis
  61. Extracting sentiment networks from Shakespeare's plays
  62. Fast and accurate - improving lexicon-based sentiment classification with an ensemble methods (2016)
  63. FBM-Yahoo! at RepLab 2012 (2012)
  64. Forex-Foreteller: currency trend modeling using news articles
  65. From unlabelled tweets to Twitter-specific opinion words
  66. Full-FACE poetry generation
  67. Fuzzy subjective sentiment phrases: a context sensitive and self-maintaining sentiment lexicon (2014)
  68. Geo-spatial event detection in the Twitter stream
  69. GeoSRS: a hybrid social recommender system for geolocated data (2015)
  70. Good friends, bad news - affect and virality in Twitter (2011)
  71. GTI: an unsupervised approach for sentiment analysis in Twitter
  72. HBE: hashtag-based emotion lexicons for Twitter sentiment analysis
  73. Identifying consumers' arguments in text (2012)
  74. Identifying disputed topics in the news (2014)
  75. iFeel 2.0: a multilingual benchmarking system for sentence-level sentiment analysis (2016)
  76. IIIT-H at SemEval 2015: Twitter sentiment analysis - the good, the bad and the neutral!
  77. IIT-TUDA at SemEval-2016 Task 5: beyond sentiment lexicon: combining domain dependency and distributional semantics features for aspect based sentiment analysis
  78. In search of reputation assessment: experiences with polarity classification in RepLab 2013 (2013)
  79. Inferring topic-dependent influence roles of Twitter users
  80. IOA: improving SVM based sentiment classification through post processing
  81. IRADABE: adapting english lexicons to the Italian sentiment polarity classification task
  82. KLUE: simple and robust methods for polarity classification
  83. KLUEless: polarity classification and association
  84. Knowledge-based tweet classification for disease sentiment monitoring (2016)
  85. Learning to recognize affective polarity in similes
  86. Lexvo.org: language-related information for the Linguistic Linked Data Cloud
  87. LLT-PolyU: identifying sentiment intensity in ironic tweets
  88. Machine reading for abstractive summarization of customer reviews in the touristic domain
  89. Making the most of tweet-inherent features for social spam detection on Twitter
  90. Measuring the influence of mass media on opinion segregation through Twitter (2014)
  91. Measuring NBA players mood by mining athlete-generated content (2015)
  92. Meta-level sentiment models for big social data analysis
  93. Mining Facebook data for predictive personality modeling
  94. Monitoring travel-related information on social media through sentiment analysis (2014)
  95. Movie script summarization as graph-based scene extraction
  96. Multi-domain collaboration for Web-based literature browsing and curation
  97. Networks and language in the 2010 election
  98. New lessions from the War in Bosnia
  99. NTNU: domain semi-independent short message sentiment classification
  100. On enhancing the label propagation algorithm for sentiment analysis using active learning with an artificial oracle
  101. Performance evaluation of sentiment classification using query strategies in a pool based active learning scenario (2015)
  102. Positive, negative, or neutral: learning an expanded opinion lexicon from emoticon-annotated tweets
  103. Predictingg tie strength with the Facebook API (2014)
  104. Privacy nudges for social media: an exploratory Facebook study (2013)
  105. Probing of geospatial stream data to report disorientation (2013)
  106. Real-time monitoring of sentiment in business related Wikipedia (2013)
  107. Rule-based visual mappings -- with a case study on poetry visualization (2013)
  108. Representing and resolving negation for sentiment analysis (2012)
  109. Restaurant rating: industrial standard and word-of-mouth a text mining and multi-dimensional sentiment analysis
  110. Sarcasm as contrast between a positive sentiment and negative situation (2013)
  111. Semi-automated argumentative analysis of online product reviews (2012)
  112. Sensing social media for corporate reputation management: a business agility perspective
  113. Sentiment analysis on microblogs for natural disasters management: a study on the 2014 Genoa Floodings
  114. Sentiment classification of online political discussions: a comparison of a word-based and dependency-based method (2014)
  115. Sentiment valences for automatic personality detection of online social networks users using three factor model (2015)
  116. Sentiue: target and aspect based sentiment analysis in SemEval-2015 Task 12 (2015)
  117. Simple approaches of sentiment analysis via ensemble learning
  118. Solving the online review puzzle
  119. Some remarks on the internal consistency of online consumer reviews (2013)
  120. Someone to talk to in Advances in affective and pleasurable design.
  121. Strategies of legitimacy through social media: the networked strategy (2015)
  122. Study of different algorithms in sentiment analysis and the existing issues
  123. Suicidal tendencies: the automatic classification of suicidal and non-suicidal lyricists using NLP (2013)
  124. Summarization of yes/no questions using a feature function model (2011)
  125. Temperature and temperament: evidence from a billion tweets (2015)
  126. Text normalization of code mix and sentiment analysis
  127. Topic-specific stylistic variations for opinion retrieval on Twitter
  128. The emergence of online community leadership
  129. The FloWr framework: automated flowchart construction, optimisation and alteration for creative systems (2014)
  130. The impact of affective verbal content on predicting personality impressions in YouTube videos
  131. The lexicon-based sentiment analysis for fan page ranking in Facebook (2014)
  132. The painful tweet: text, sentiment, and community structure analyses of tweets pertaining to pain (2015)
  133. The power of Twitter on predicting box office revenues (2012)
  134. The QWERTY effect: how typing shapes the meanings of words (2012)
  135. The use of POS sequence for analyzing sentence pattern in Twitter sentiment analysis
  136. Topic-specific stylistic variations for opinion retrieval on Twitter (2016)
  137. Twista - an application for the analysis and visualization of tailored tweet collections
  138. TwitterHawk: a feature bucket approach to sentiment analysis (2015)
  139. Towards automated personality identification using speech acts
  140. Topic and sentiment analysis on OSNs: a case study of advertising strategies on Twitter
  141. Trusting smartphone apps? To install or not to install, that is the question (2013)
  142. Tuned models of peer assessment in MOOCs (2013)
  143. Tweeting the meeting: an in-depth analysis of Twitter activity at Kidney Week 2011 (2012)
  144. Tweets are forever: a large-scale quantitative analysis of deleted tweets (2013)
  145. Twitter for public health: an open-source data solution
  146. Twitter sentiment analysis on E-commerce websites in India
  147. Twitter sentiment classification on Sanders data using hybrid approach
  148. Twitter sentiment detection via ensemble classification using averaged confidence scores
  149. Two classifiers in arbiter tree to analyze data
  150. Uncovering patterns in student work: machine learning to understand human learning
  151. Understanding online hotel reviews through automated text analysis (2016)
  152. Unsupervised method for sentiment analysis in online texts (2016)
  153. US presidential election 2012 prediction using census corrected Twitter model (2012)
  154. Use of social media data to explore crisis informatics(?) (2015)
  155. Using combined lexical resources to identify hashtag types
  156. Using hashtags as labels for supervised learning of emotions in Twitter messages (2014)
  157. Using social media data to study people's perception and knowledge of environments
  158. Valence shifting: is it a valid task?
  159. ValenTo: sentiment analysis of figurative language tweets with irony and sarcasm
  160. Voices of victory: a computational focus group framework for tracking opinion shift in real time
  161. Webis: an ensemble for Twitter sentiment detection
  162. Whisper: tracing the spatiotemporal process of information diffusion in real time (2012)

[edit] Mentioning

  1. A machine learning attack against the civil rights CAPTCHA
  2. A mathematical approach to gauging influence by identifying shifts in the emotions of social media users
  3. A novel sentiment analysis of social networks using supervised learning
  4. An overview of sentiment analysis in social media and its applications in disaster relief
  5. A quantitative analysis of gender differences in movies using psycholinguistic normatives
  6. A survey on opinion mining and sentiment analysis: tasks, approaches and applications
  7. Adapting sentiment lexicons using contextual semantics for sentiment analysis of Twitter
  8. Advanced classification lists (dirty word lists) for automatic security classification
  9. An integrated text analytic framework for product defect discovery (2014)
  10. Automatic mood classification of Indonesian tweets using linguistic approach
  11. Benchmarking sentiment analysis methods for large-scale texts: a case for using continuum-scored words and word shift graphs
  12. Classifying emotion in Thai youtube comments
  13. Crawling JavaScript websites using WebKit - with application to analysis of hate speech in online discussions
  14. Comparative study: the implementation of machine learning method for sentiment analysis in social media. A recommendation for future research
  15. Demystifying MapReduce
  16. Detection and scoring of Internet slangs for sentiment analysis using SentiWordNet
  17. Differential emotions and the stock market - the case of company-specific trading
  18. Engagement with health agencies on Twitter
  19. Feature-level sentiment analysis applied to Brazilian Portuguese reviews
  20. Feature sentiment diversification of user generated reviews: the FREuD approach (2015)
  21. GU-MLT-LT: Sentiment Analysis of Short Messages using Linguistic Features and Stochastic Gradient Descent
  22. Increasing the willingness to collaborate online: an analysis of sentiment-driven interactions in peer content production (2011, closed access)
  23. Natural language processing in accounting, auditing and finance: a synthesis of the literature with a roadmap for future research
  24. NTNU: domain semi-independent short message sentiment classification
  25. Methodology for Twitter sentiment analysis
  26. Mining fine-grained argument elements
  27. Mining social network data for cyber physical system
  28. Opinion recognition on movie reviews by combining classifiers
  29. OpinionMining-ML
  30. Overview of the Evalita 2014 SENTIment POLarity Classification task
  31. Predicting personality traits of Chinese users based on Facebook wall posts (2015)
  32. Privacy nudges for OSNs: a review (2014)
  33. Product aspect ranking using sentiment analysis: a survey
  34. Reducing sparsity in sentiment analysis data using novel dimensionality reduction approaches
  35. Retrieving minority product reviews using positive/negative skewness
  36. SemEval-2013 task 2: sentiment analysis in Twitter
  37. SemEval-2015 task 12: aspect based sentiment analysis
  38. SemEval-2016 Task 7: determining sentiment intensity of English and Arabic phrases
  39. Sentiment analysis over social networks: an overview
  40. Sentiment analysis: detecting valence, emotions, and other affectual states from text (Saif M. Mohammad review)
  41. Sentiment analysis techniques in recent works
  42. SentiMeter-Br: Facebook and Twitter analysis tool to discover consumers' sentiment
  43. Simultaneous feature selection and parameter optimization using multi-objective optimization for sentiment analysis
  44. Social data integration and analytics for health intelligence
  45. State of the art language technologies for Italian: the EVALITA 2014 perspective
  46. SWIMS: semi-supervised subjective feature weighting and intelligent model selection for sentiment analysis
  47. TASS 2015 - the evolution of the Spanish opinion mining systems
  48. Text mining of news-headlines for FOREX market prediction: a multi-layer dimension reduction algorithm with semantics and sentiment
  49. The challenges of sentiment detection in the social programmer ecosystem
  50. The comprehension of figurative language: what is the influence of irony and sarcasm on NLP techniques?
  51. The impact of sentiment-driven feedback on knowledge reuse in online communities
  52. The muses of poetry - in search of the poetic experience
  53. The sound of valence: phonological features predict word meaning
  54. Time-space varying visual analysis of micro-blog sentiment
  55. The next generation poetic experience
  56. The potential of microblogs for the study of public perceptions of climate change
  57. VADER: a parsimonious rule-based model for sentiment analysis of social media text
  58. Workshop on computational personality recognition: shared task

[edit] Student papers

  1. Análisis Estático y Dinámico de opiniones en Twitter (Felipe José Bravo Márquez, 2013)
  2. Analyzing emotion on Twitter for user modeling (Shaolong Li, Master Thesis, 2013)
  3. Aspect-based opinion summarization of product reviews on social media (Ásgeir Ögmundarson, Master Thesis, 2015)
  4. Classification and visualisation of Twitter sentiment data (mentioning, Mikael Brevik, Øyvind Selmer, 2013 Master Thesis)
  5. Combining lexicon- and learning-based approaches for improved performance and convenience in sentiment classification
  6. Distributional methods for sentiment analysis (Emmanuele Chersoni, 2013, Master Thesis)
  7. Evaluation of natural language processing techniques for sentiment analysis on tweets (2012, Bachelor Thesis)
  8. Exploitation of tweets to measure experienced utility (Allison Madigan, 2013)
  9. Forecasting success in the National Hockey League using in-game statistics and textual data (Master Thesis, 2014)
  10. Natural language processing methods for attitudinal near-synonymy
  11. Opinion mining and name entity detection from news comments
  12. Real-time Twitter sentiment classification based on Apache Storm (2015, Master Thesis)
  13. Relationships between social media sentiment, customer satisfaction, and stock price performance (Master Thesis, 2013)
  14. Retweets--but not just retweets: quantifying and predicting influence on Twitter (2012, Bachelor thesis)
  15. Sentiment mining using machine learning optimization (2015 Master Thesis)
  16. Social media sentiment analysis (2014 Master Thesis)
  17. Social media sentiment analysis for stock price behavior prediction
  18. Using movie screenplays as a barometer for mood in history (2014, [1])
  19. Twitter data analysis for financial markets
  20. TwitterCritic: sentiment analysis of tweets to predict TV ratings
  21. Um benchmark para comparação de métodos para análise de sentimentos (Master Thesis, 2015)
  22. Una aproximación basada en aprendizaje automático para diversos problemas de procesamiento de lenguaje natural en redes sociales (2016)
  23. Using social media content to inform agent-based models for humanitarian crisis response (Bachelor Thesis, 2014)
  24. Why not! Sequence labeling the scope of negation using dependency features (2012 Master Thesis)
  25. Sentiment analysis of microblogs (Tobias Günther, 2013)

Andrew Ng's CS 229 class:

  1. Robert Chang, Sam Pimentel, Alexandr Svistunov, Sentiment Analysis of Occupy Wall Street Tweets, 2011. [2]
  2. Derek Farren, Predicting retail website anomalies using Twitter data, 2012. [3]

[edit] Mentioning

  1. A framework to analyse and visualise public sentiment using Twitter data
  2. Inference of personality using social media profiles
  3. Mining social media: methods and approaches for content analysis
  4. Sentiment analysis for Bangla microblog posts
  5. Sentiment analysis of Norwegian Twitter messages
  6. Sentiment mining using machine learning optimization
  7. Twitter sentiment analysis (specialization project, Fall 2015)

[edit] Blogs

  1. Finn Årup Nielsen's blog, posts tagged with 'afinn'.
  2. Tracking US Sentiments Over Time In Wikileaks
  3. Kaushal Agrawal – Data Visualization – Mood of the Artist
  4. First shot: Sentiment Analysis in R, Andy Bromberg
  5. All Your Tweets Are Belong To Us: the Twitterverse declares a winner
  6. The Happiest And Saddest Fans In Baseball, FiveThirtyEight, 2015.
  7. If I Loved Natural Language Processing Less, I Might Be Able to Talk About It More, sentiment analysis of Jane Austen works by Julia Silge.

[edit] Mentioning

  1. Sometimes I think we don’t deserve good data Google Ngram.
  2. Introduction to Sentiment Analysis , Carl Anderson, OneKingsLane.com

[edit] Tools

  1. Simplest sentiment analysis in Python with AFINN (note UNICODE issue for the word naïve, use "unicode(w, 'utf-8')" )
  2. Javascript
    1. AFINN-based sentiment analysis for Node.js
    2. application
    3. Retext sentiment
  3. lexicons, Python and Javascript libraries
  4. AFINN-based sentiment analysis in Perl
  5. Afinn-for-Norsk
  6. Django
  7. Common Lisp
  8. troll, Javascript, Andrew Sliwinski.
  9. C-sharp (C#) by Tomasz Cielecki
  10. Große Gefühle Heise c't magazine in German with source code and tools in Ruby and Java.
  11. SAS Text Mining ("what's new" for the commercial product)
  12. A Better Place, chrome extension. The extension was made in response to Experimental evidence of massive-scale emotional contagion through social networks.
  13. syuzhet, R. [4]
  14. Data Science Toolkit, http://www.datasciencetoolkit.org/ webservice that uses AFINN for online sentiment analysis

[edit] Language versions

[edit] Services

[edit] Coursera

Bill Howe's Coursera course Introduction to Data Science has a sentiment analysis task were - apparently - AFINN is used on Twitter posts

[edit] References

  1. In search of reputation assessment: experiences with polarity classification in RepLab 2013
  2. Meta-level sentiment models for big social data analysis
  3. Meta-level sentiment models for big social data analysis
  4. Fuzzy subjective sentiment phrases: a context sensitive and self-maintaining sentiment lexicon
  5. Twitter polarity classification with label propagation over lexical links and the follower graph
  6. Twitter polarity classification with label propagation over lexical links and the follower graph
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