Title: Automatic short answer grading using rough concept clusters
Authors: Udit Kr. Chakraborty; Debanjan Konar; Samir Roy; Sankhayan Choudhury
Addresses: Department of Computer Science and Engineering, Sikkim Manipal Institute of Technology, Sikkim (E), India ' Department of Computer Science and Engineering, Sikkim Manipal Institute of Technology, Sikkim (E), India ' Department of Computer Science and Engineering, National Institute of Technical Teacher's Training and Research, Salt Lake City, Kolkata, India ' Department of Computer Science and Engineering, University of Calcutta, Salt Lake City, Kolkata, India
Abstract: Evaluation of text-based answers has stayed as a challenge for researchers in recent years and with the growing acceptance of e-learning system, a solution needs to be achieved fast. While assessing the knowledge content, correctness of expression and linguistic patterns are complex issues in themselves, a smaller answer may be evaluated using keyword matching only. The work proposed in this paper is aimed at evaluating smaller text answers, no longer than a single sentence using keyword matching. The proposed method agglomerates keywords from a group of model answers forming clusters of words. The evaluation process thereafter exploits the inherent roughness of the keyword clusters to evaluate a learners' response through comparison and keyword matching. The novelty in the proposed system lies in the usage of fuzzy membership functions along with rough set theory to evaluate the answers. Rigorous tests have been conducted on dataset built for the purpose returned good correlation values with the average of two human evaluators. The proposed system also fares better than latent semantic analysis (LSA) based and link grammar-based evaluation systems.
Keywords: text answer; single sentence; keyword; concept cluster; rough set; latent semantic analysis; LSA; link grammar.
International Journal of Advanced Intelligence Paradigms, 2019 Vol.14 No.3/4, pp.260 - 280
Received: 18 Feb 2016
Accepted: 14 Dec 2016
Published online: 06 Nov 2019 *