Yukiko Uchida


2024

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Estimation of Happiness Changes through Longitudinal Analysis of Employees’ Texts
Junko Hayashi | Kazuhiro Ito | Masae Manabe | Yasushi Watanabe | Masataka Nakayama | Yukiko Uchida | Shoko Wakamiya | Eiji Aramaki
Proceedings of the 14th Workshop on Computational Approaches to Subjectivity, Sentiment, & Social Media Analysis

Measuring happiness as a determinant of well-being is increasingly recognized as crucial. While previous studies have utilized free-text descriptions to estimate happiness on a broad scale, limited research has focused on tracking individual fluctuations in happiness over time owing to the challenges associated with longitudinal data collection. This study addresses this issue by obtaining longitudinal data from two workplaces over two and six months respectively.Subsequently, the data is used to construct a happiness estimation model and assess individual happiness levels.Evaluation of the model performance using correlation coefficients shows variability in the correlation values among individuals.Notably, the model performs satisfactorily in estimating 9 of the 11 users’ happiness scores, with a correlation coefficient of 0.4 or higher. To investigate the factors affecting the model performance, we examine the relationship between the model performance and variables such as sentence length, lexical diversity, and personality traits. Correlations are observed between these features and model performance.

2020

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Classification of Nostalgic Music Through LDA Topic Modeling and Sentiment Analysis of YouTube Comments in Japanese Songs
Kongmeng Liew | Yukiko Uchida | Nao Maeura | Eiji Aramaki
Proceedings of the 1st Workshop on NLP for Music and Audio (NLP4MusA)