eng Science and Education Publishing American Journal of Educational Research 2327-6150 2018-06-30 6 7 887 892 10.12691/education-6-7-1 EDUCATION2018671 article Maria Tensiana Tima maria0351pasca2016@student.uny.ac.id 1 Hari Sutrisno 1 2 Chemistry Education Master's and Doctoral Programs, Graduate School, Yogyakarta State University, Yogyakarta 55281, Indonesia The aim of the research was to investigate the difference of the mean value of student's academic self-efficacy and student's cognitive achievement between the application of problem-solving based on multiple representations model and problem-solving model regarding topic related chemical equilibrium. The method of research was quasi-experimental. The design of research was posttest only design with equivalent control group. Fifty students of State Senior High School in Yogyakarta, Indonesia were recruited for participation (sample) in the study which were divided into two groups. The experimental group consisted of 26 students (11 male and 15 female) and a control group consisted of 24 students (15 male and 9 female). The experimental group applied the problem-solving based on multiple representations model, while the control group applied the problem-solving model. The data were analyzed by using MANOVA-test statistics. Hypothesis test showed that there were differences of the mean value of student's academic self-efficacy and student's cognitive achievement between the experimental group and the control group on topic related chemical equilibrium. This result presented that the mean value of student's academic self-efficacy and student's cognitive achievement taught by the problem solving based on multiple representations model was better than by the problem solving model. http://pubs.sciepub.com/education/6/7/1/education-6-7-1.pdf problem-solving multiple representations self-efficacy cognitive achievement