抄録
This study was performed to determine whether keywords (KW) and key sentences (KS) can be used as objective indicators for sentence evaluation by comparing these parameters determined from evaluation results and potential meaning analysis by an essay evaluator. This study was performed using two types of experimental sentence, including a total of 12 patterns-five patterns of "surface change sentences," which are sentences where KW and KS obtained by Latent Semantic Analysis (LSA) of a particular sentence (original sentence) are changed, and 7 patterns of "compositional change sentences", where sentence composition is altered by changing the order of the paragraphs. These sentences were used as essay evaluation problems, which were solved in the following order: (1) Evaluation of original and experimental sentences; (2) KW and KS selection when these sentences were comprehended and evaluated. The results indicated that KW are applicable to judging the content rather than the quality of the essay, and KS correspond to those valued by human readers during evaluation.
