arXivDaily arXiv每日学术速递 周一至周五更新
北美退伍军人节(Veterans Day),12 日无更新
arXiv 2108.05709cs.HC
收藏

评价或不评价:研究生成的协同语音手势的评价方法

To Rate or Not To Rate: Investigating Evaluation Methods for Generated Co-Speech Gestures

Pieter Wolfert, Jeffrey M. Girard, Taras Kucherenko, Tony Belpaeme

摘要:

虽然自动性能指标对于人工类人行为的机器学习至关重要,但评估的黄金标准仍然是人类的判断。然而,对体现在会话代理中的人工类人行为的主观评估是昂贵的,并且对其返回的数据的质量知之甚少。主观评价的两种方法在很大程度上可以区分开来,一种是依靠评分,另一种是成对比较。在这项研究中,我们使用共同的语音手势来比较这两个对彼此和回答问题,他们的适当性评估的人工行为。我们不仅考虑了他们对质量进行评级的能力,还考虑了与使用工作量和收集主观数据所需的时间有关的方面。我们使用众包来评估化身中共同语音手势的质量,评估哪种方法在主观评估中获得更多细节。我们比较了三种不同的机器学习模型产生的手势与不同水平的行为质量。我们发现,这两种方法都能够根据质量对视频进行排名,并且排名显着相关,这表明在质量方面,一种方法并没有优于另一种方法。我们还发现,成对比较的速度略快,并与提高评分者间的可靠性,这表明,对于小规模的研究,成对比较是优于评级。

英文摘要:

While automatic performance metrics are crucial for machine learning of artificial human-like behaviour, the gold standard for evaluation remains human judgement. The subjective evaluation of artificial human-like behaviour in embodied conversational agents is however expensive and little is known about the quality of the data it returns. Two approaches to subjective evaluation can be largely distinguished, one relying on ratings, the other on pairwise comparisons. In this study we use co-speech gestures to compare the two against each other and answer questions about their appropriateness for evaluation of artificial behaviour. We consider their ability to rate quality, but also aspects pertaining to the effort of use and the time required to collect subjective data. We use crowd sourcing to rate the quality of co-speech gestures in avatars, assessing which method picks up more detail in subjective assessments. We compared gestures generated by three different machine learning models with various level of behavioural quality. We found that both approaches were able to rank the videos according to quality and that the ranking significantly correlated, showing that in terms of quality there is no preference of one method over the other. We also found that pairwise comparisons were slightly faster and came with improved inter-rater reliability, suggesting that for small-scale studies pairwise comparisons are to be favoured over ratings.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑