Presently, educational institutions compile and store huge volumes of data, such as student enrolment and attendance records, as well as their examination results. Mining such data yields stimulating information that serves its handlers well. Rapid growth in educational data points to the fact that distilling massive amounts of data requires a more sophisticated set of algorithms. This issue led to the emergence of the field of educational data mining (EDM). Traditional data mining algorithms cannot be directly applied to educational problems, as they may have a specific objective and function. This implies that a preprocessing algorithm has to be enforced first and only then some specific data mining methods can be applied to the problems. One such preprocessing algorithm in EDM is clustering. Many studies on EDM have focused on the application of various data mining algorithms to educational attributes. Therefore, this paper provides over three decades long (1983-2016) systematic literature review on clustering algorithm and its applicability and usability in the context of EDM. Future insights are outlined based on the literature reviewed, and avenues for further research are identified.

Anxiety is one of the major predictors of academic performance. Students with anxiety disorder display a passive attitude in their studies such as lack of interest in learning, poor performance in exams, and on assignments. This research observes the relationship between study anxiety level and students’ academic performance. The test to find out a significant correlation of anxiety and academic performance was has carried out among engineering students. A total 205 males and females student participated in this test. They were second year students from four engineering faculties at Universiti Malaysia Pahang (UMP). The study anxiety level was measured using State Trait Anxiety Inventory (STAI). Meanwhile, students’ academic performance was measured using Grade Point Average (GPA). The results showed that there was a significant correlation of high level anxiety and low academic performance among engineering students, with significant correlation (p = 0.000) and the correlation coefficient is small with r = -.264. Large of sample size required to strengthen the coefficient correlation was suggested for further research. Keywords Study anxiety Academic performance Student References Anderson, 2007 Anderson, V. (2007). An Online Survey to Assess Student Anxiety and Attitude Response to Six Different Mathematical Problems. In Proceedings of the 30th Annual Conference of the Mathematics Education Research Group of Australasia, J. Watson & K. Beswick (Eds), © MERGA Inc., 93-102. Ansari., 2009 Ansari. N. (2009). The Relationship between Perceived Size of Library Collection and Library Anxiety among Undergraduate Students at International Islamic University Malaysia. (online) http://crl.du.ac.in/ical09/papers/index_files/ical-72_34_160_2_RV.pdf. Anthony. et al., 2004 Anthony. J.O, Qun. G.J, and Sharon. L. B. (2004). Library Anxiety . Published by Scare Crow Press, US. Aronen. et al., 2004 Aronen. E.T, Vuontella. V, Steenari. M.R, Salmi, J, and Carlson, S. 2004. Working memory, psychiatric symptoms, and academic performance at school. Neurobiology of Learning and Memory , Elsivier. 83(1) 33-42. Doi:10.1016/j.nlm.2004.06.010. Breuer, 1999 A. Breuer Biofeedback and Anxiety Psychiatric Times 16 2 1999 1 2 Brown-Chidsey, 2005 Brown-Chidsey, R. (2005). Assessment for Intervention: A Problem Solving Approach . Guilford Press, New York. Callahan, 2001 R.J. Callahan The Impact of Thought Field Therapy on Heart Rate Variability (HRV) Journal of Clinical Psychology. 57 10 2001 1153 1170 Carroll and Garavalia, 2004 C.A. Carroll L.S. Garavalia Factors Contributing to the Academic Achievement of Pharmacy Students: Use of the Goal Efficacy framework American Journal of Pharmaceutical Education 68 4 2004 1 8 El-Anzi, 2005 El-Anzi, F.O. 2005. Academic achievement and its relationship with anxiety, self-esteem, optimism, and pessimism in kuwaiti students. Social Behavior and Personality. FindArticles.com . (online) http://findarticles.com/p/articles/mi_qa3852/is_200501/ai_n9520814/.(11 November 2008). Ercan et al., 2008 I. Ercan E. Irgil D. Sigirl N.S. Qzen I. Kan Evaluation of anxiety among medical and engineering students by factor analysis Studia Psychologica 50 3 2008 267 275 Fazey and Hardy, 1988 Fazey, J and Hardy, L. 1988. The inverted-U hypothesis: catastrophe for sport psychology . British Association of Sports Sciences Monograph No. 1. Leeds: The National Coaching Foundation. Field, 2005 Field, A. (2005). Discovering Statistics Using SPSS, 2nd Edition . Los Angeles, USA, SAGE publications. Gomez. et al., 2002 Gomez. A.A, Tavares. J, and Azevedo. M.H. (2002). Sleep-Wake Patterns and Academic Performance in University Students. In Proceeding of The European Conference on Educational Research, University of Lisbon , 11-14 September 2002. Guerrero, 1990 Guerrero, R.D. (1990). Gender and Social Class Determinants of Anxiety in The Mexican Culture. Cross-Culture Anxiety. Hemisphere USA, 1990. Hamzah, 2007 Hamzah, M.H. (2007). Language Anxiety among First Year Malay Students of the International Islamic College: An Investigation of L2 skills, Sources of anxiety, and L2 performance. A Master Dissertation in Human Science, IIUM, Malaysia. Harris and Coy, 2003 Harris, H.L and Coy, D.R. (2003). Helping Students Cope with Test Anxiety . ERIC Counseling and Student Services Clearinghouse, ERIC Identifier: ED479355. Ingurgio, 1999 Ingurgio, V.J. (1999). The Effect of State Anxietyupon a Motor Task: An Application of the Cups Catastrophe Model . Ph.D. Dissertation, Department of Psychology, University of Oklahoma, 1-101. Janet. et al., 1987 F.H. Janet C. Nathan H. Karyl Premorbid Prevalence of Poor Academic Performance in Severe Head Injury, Journal of Neurology Neurosurgery, and Psychiatry 50 1987 52 56 Luigi et al., 2007 Luigi, M., Francesca, D., Maria, D.S., Eleonora, P., Valentina, G.D. and Benedetto, V. (2007). The Role of Anxiety Symptoms in School Performance in a Community Sample of Children and Adolescents. BMC Public Health 7 (347) doi: 10.1186/1471-2458r-r7-347. Mark and Robin, 1997 Mark, R.L. and Robin, M.K. (1997). Social Anxiety, 1st edition . The Guilford Press; New York. Matsuda and Gobel, 2003 S. Matsuda P. Gobel Anxiety and Predictors of Academic Performance in the Foreign Language Classroom System 32 1 2003 21 36 Mayya et al., 2004 Mayya, S.S., Rao, A.K., and Ramnarayan, K. (2004). Learning approaches, learning difficulties and academic performance of undergraduate students of physiotherapy. The Internet Journal of Allied Health Science and Practice, 2 (4 ). (online) http://ijahsp.nova.edu/articles/vol2num4/mayya.htm. Ma and Xu, 2003 X. Ma J. Xu The Causal Ordering of Mathematics Anxiety and Mathematic Achievement A Longitudinal Panel Analysis Journal of Adolescence 27 2 2003 165 179 McCraty et al., 2000 McCraty, R., Dana, T., Mike, A., Pam, A, and Stephen, J. (2000). Improving Test-Taking Skills and Academic Performance in High School Students using HeartMath Learning...