行動計量学
Online ISSN : 1880-4705
Print ISSN : 0385-5481
ISSN-L : 0385-5481
特集 MCMCを利用した柔軟なデータ解析的アプローチ
自由記述における汲みつくしの指標としての遭遇率の提案
— パレート分布を用いた分析—
大橋 洸太郎池原 一哉豊田 秀樹
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2012 年 39 巻 2 号 p. 117-126

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In this article, the encounter probability, possibility to find unknown words in free descriptions was proposed. When a researcher thinks the amount of data was sufficient and decides to stop collecting data, this index gives us useful information. By the encounter probability, we can know how often we get unknown words. Free description data from two companies was analyzed by some Pareto distributions to decide most suitable model to explain frequency of words. Parameters of these distributions were estimated by using Markov chain monte carlo mehod. Consequently it was shown that these free descriptions were sufficient amount of information by calculating encounter probability.

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© 2012 日本行動計量学会
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