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arXiv 2210.09167cs.CL
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我们如何到达那里?评估Transformer神经网络作为英语过去式屈折变化的认知模型

How do we get there? Evaluating transformer neural networks as cognitive models for English past tense inflection

The Graduate Center, CUNY(纽约市立大学研究生中心);Toyota Technological Institute at Chicago(芝加哥丰田技术研究所)

Xiaomeng Ma, Lingyu Gao

AI总结:

本研究训练多种Transformer模型,评估其在英语过去式屈折任务上的表现,发现模型能部分学习规则性抽象类别,但与人类行为相关性弱,不适合作为认知模型。

摘要:

关于神经网络能否像人类一样掌握语言中的准规则性,一直存在争论。在一个典型的准规则性任务——英语过去式屈折变化中,神经网络模型长期以来受到批评,认为它只学会泛化最频繁的模式,而非规则模式,因此无法学习规则与不规则动词的抽象类别,且与人类表现不相似。在本工作中,我们训练了一组不同设置的Transformer模型,以检验它们在此任务上的行为。模型在未见过的规则动词上取得了高准确率,在未见过的规则动词上取得了一定的准确率。模型在规则动词上的表现受类型频率和比例的影响很大,但不受词频和比例的影响;而不规则动词则相反。规则与不规则动词上的不同行为表明,模型在动词规则性上具有一定程度的符号学习。此外,模型在非词动词上与人类行为的相关性较弱。尽管Transformer模型在动词规则性的抽象类别上表现出一定程度的学习,但其表现并不能很好地拟合人类数据,这表明它可能不是一个好的认知模型。

英文摘要:

There is an ongoing debate on whether neural networks can grasp the quasi-regularities in languages like humans. In a typical quasi-regularity task, English past tense inflections, the neural network model has long been criticized that it learns only to generalize the most frequent pattern, but not the regular pattern, thus can not learn the abstract categories of regular and irregular and is dissimilar to human performance. In this work, we train a set of transformer models with different settings to examine their behavior on this task. The models achieved high accuracy on unseen regular verbs and some accuracy on unseen irregular verbs. The models' performance on the regulars is heavily affected by type frequency and ratio but not token frequency and ratio, and vice versa for the irregulars. The different behaviors on the regulars and irregulars suggest that the models have some degree of symbolic learning on the regularity of the verbs. In addition, the models are weakly correlated with human behavior on nonce verbs. Although the transformer model exhibits some level of learning on the abstract category of verb regularity, its performance does not fit human data well, suggesting that it might not be a good cognitive model.

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。

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