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Automated Scoring of Handwritten Essays Based on Latent Semantic Analysis

机译:基于潜在语义分析的手写散文自动评分

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Handwritten essays are widely used in educational assessments, particularly in classroom instruction. This paper concerns the design of an automated system for performing the task of taking as input scanned images of handwritten student essays in reading comprehension tests and to produce as output scores for the answers which are analogous to those provided by human scorers. The system is based on integrating the two technologies of optical handwriting recognition (OHR) and automated essay scoring (AES). The OHR system performs several pre-processing steps such as forms removal, rule-line removal and segmentation of text lines and words. The final recognition step, which is tuned to the task of reading comprehension evaluation in a primary education setting, is performed using a lexicon derived from the passage to be read. The AES system is based on the approach of latent semantic analysis where a set of human-scored answers are used to determine scoring system parameters using a machine learning approach. System performance is compared to scoring done by human raters. Testing on a small set of handwritten answers indicate that system performance is comparable to that of automatic scoring based on manual transcription.
机译:手写的散文广泛用于教育评估,特别是在课堂教学中。本文涉及用于在阅读理解测试中执行手写学生论文的输入扫描图像的自动化系统的设计,并为答案的输出分数产生类似于人类分光器提供的答案。该系统基于集成光学手写识别(OHR)和自动化论文评分(AES)的两种技术。 OHR系统执行多个预处理步骤,例如表单删除,规则行删除和文本线条和单词的分割。使用从要读取的通道的源自读取的词典来执行被调整到初级教育环境中阅读理解评估任务的最终识别步骤。 AES系统基于潜在语义分析的方法,其中使用一组人类缩小的答案来使用机器学习方法来确定评分系统参数。将系统性能与人类评估者进行比较进行比较。在一小组手写答案上测试表明系统性能与基于手动转录的自动评分相当。

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