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Modeling sequences of user actions for statistical goal recognition

机译:为统计目标识别建模用户动作序列

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摘要

User goals are of major importance for an interface agent because they serve as a context to define what the user's focus of attention is at a given moment. The user's goals should be detected as soon as possible, after observing few user actions, in order to provide the user with timely assistance. In this article, we describe an approach for modeling and recognizing user goals from observed sequences of user actions by using Variable Order Markov models combined with an exponential moving average (EMA) on the prediction probabilities. The validity of our approach has been tested using data collected from real users in the Unix domain. The results obtained show that an interface agent can achieve near 90% average accuracy and over 58% online accuracy in predicting the most probable user goal after each observed action, in a time linear to the number of goals being modeled. We also found that the use of an EMA allows a faster convergence in the actual user goal.
机译:用户目标对于界面代理来说非常重要,因为它们充当定义用户在给定时刻关注的焦点的上下文。在观察到很少的用户动作之后,应尽快检测用户的目标,以便为用户提供及时的帮助。在本文中,我们描述了一种方法,该方法通过使用可变阶马尔可夫模型与预测概率的指数移动平均值(EMA)相结合,从观察到的用户操作序列建模和识别用户目标。我们的方法的有效性已使用从Unix域中的实际用户收集的数据进行了测试。获得的结果表明,界面代理在预测每个观察到的动作后,在与建模的目标数量呈线性关系的时间内预测最可能的用户目标时,可以达到接近90%的平均准确度和超过58%的在线准确度。我们还发现,使用EMA可以更快地达到实际用户目标。

著录项

  • 来源
    《User modeling and user-adapted interaction》 |2012年第3期|p.281-311|共31页
  • 作者单位

    Department of Computer Science, UNICEN University, Campus Universitario (B7001BBO), Tandil, Argentina,ISISTAN Research Institute, Fac. Cs. Exactas, UNCPBA, Tandil, Argentina,CONICET, National Council of Scientific and Technological Research, Tandil, Argentina;

    Department of Computer Science, UNICEN University, Campus Universitario (B7001BBO), Tandil, Argentina,ISISTAN Research Institute, Fac. Cs. Exactas, UNCPBA, Tandil, Argentina,CONICET, National Council of Scientific and Technological Research, Tandil, Argentina;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    goal recognition; variable order markov models; interface agents; user modeling;

    机译:目标识别;变序马尔可夫模型;接口代理;用户建模;

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