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Jurnal Infinity

infinity
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Published by STKIP Siliwangi Bandung

ISSN : 20896867 EISSN : 24609285 DOI : -

Core Subject : Education,

Education

Infinity Journal published by STKIP Siliwangi Bandung (IKIP Siliwangi) and Indonesian Mathematics Educators' Society (IMES) publishes original research or theoretical papers about teaching and learning in a mathematics education study program on current science issues.

Arjuna Subject : -

Articles 339 Documents

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ANALYSIS OF STUDENTS MATHEMATICAL REPRESENTATION AND CONNECTION ON ANALYTICAL GEOMETRY SUBJECT Muchamad Subali Noto; Wahyu Hartono; Dadan Sundawan
Jurnal Infinity Vol 5, No 2 (2016): Volume 5 Number 2, Infinity
Publisher : IKIP Siliwangi and I-MES

The importance ability of mathematical representation and connection to owned by the student really help students in understanding the mathematical concepts in the form of pictures, symbols, and the written word. The use of mathematical representation and the correct connection by students will help students make mathematical ideas more concrete and can connect a concept to another concept, so that students can develop a view of mathematics as a whole integration. This research aims to describe and analyze the ability of representation and mathematical connection on the topics of analytical geometry. The research method was descriptive with the subject as much as 22 mathematics students. Data collected through tests and interviews. The results show that the average ability of representation is 46.00; the average mathematical connection ability is 36.77. This means both the abilities still belongs to low, particularly for the ability of mathematical connection.

A RELATIONSHIP BETWEEN PROBLEM SOLVING ABILITY AND STUDENTS’ MATHEMATICAL THINKING Nita Delima
Jurnal Infinity Vol 6, No 1 (2017): Volume 6 Number 1, INFINITY
Publisher : IKIP Siliwangi and I-MES

This research have a purpose to know is there an influence of problem solving abilty to students mathematical thinking, and to know how strong problem solving ability affect students mathematical thinking. This research used descriptive quantitative method, which a population is all of students that taking discrete mathematics courses both in department of Information Systems and department of mathematics education. Based on the results of data analysis showed that there are an influence of problem solving ability to students mathematical thinking either at department of mathematics education or at department of information systems. In this study, it was found that the influence of problem solving ability to students mathematical thinking which take place at mathematics education department is stonger than at information system department. This is because, at mathematics education department, problem-solving activities more often performed in courses than at department of information system. Almost 75% of existing courses in department of mathematics education involve problem solving to the objective of courses, meanwhile, in the department of information systems, there are only 10% of these courses. As a result, mathematics education department student’s are better trained in problem solving than information system department students. So, to improve students’ mathematical thinking, its would be better, at fisrtly enhance the problem solving ability.

UJI KOEFISIEN VARIANSI KONSTAN DALAM REGRESI NONPARAMETRIK Asri Ode Samura
Jurnal Infinity Vol 4, No 2 (2015): Volume 4 Number 2, Infinity
Publisher : IKIP Siliwangi and I-MES

ABSTRAKTulisan ini membahas uji baru untuk hipotesis koefisien variansi konstan dalam model umum regresi nonparametrik. Uji ini didasarkan pada estimasi jarak antara kuadrat dari fungsi regresi dan fungsi varians. Dalam tulisan ini telah dilakukan pengujian formal untuk hipotesis dari koefisien variansi konstan dalam regresi nonparametrik yaitu dengan melakukan sebuah uji simulasi kecil, yang mana hipotesis nol akan ditolak jika persamaannya terpenuhi, dan sebaliknya hipotesis nol akan ditolak jika hipotesisnya tidak terpenuhi. Dengan menggunakan teknik smoothing yakni fungsi kernel dalam hal ini dilakukan uji simulasi kecil untuk membuktikan hipotesis uji bootstrapKata Kunci : Analisis Regresi, Regresi Parametrik, Regresi Nonparametrik, Teknik Smoothing, Kernel, Bootstrap ABSTRACTThis write propose a new test for the hypothesis of a constant coefficient of variance in the common nonparametric regression model. The test is based on the estimated distance between the square of the regression function and variance function. In this write have been done a formal test for the hypothesis of a constant coefficient of variance in nonparametric regression is to perform a small simulation test, in which the null hypothesis is rejected if the equation is fulfilled, and otherwise the null hypothesis is rejected if the hypothesis is not fulfilled. By using the smoothing technique that is the kernel function in this small simulation test to prove the hypothesis of the bootstrap test.Keywords: Regression Analysis, Regression Nonparametric, Smoothing Technique, Kernel, Bootstrap

ANALYSIS OF STUDENTS’ MATHEMATICAL COMMUNICATION ABILITY BY USING COOPERATIVE LEARNING TALKING STICK TYPE Dwi Maulida Sari
Jurnal Infinity Vol 6, No 2 (2017): VOLUME 6 NUMBER 2, INFINITY
Publisher : IKIP Siliwangi and I-MES

This research aims to describe the students’ mathematical communication ability by using cooperative learning talking stick type. This research conducted at one of junior high school in Asahan-North Sumatera- North Sumatera. This research used posttest experimental class design as the method to obtain data. The indicators used to measure mathematical communication ability in this research arranged in three, as follows: 1) the ability of explaining a mathematical problem into figure; 2) the ability to explain mathematical problem situations by own words; 3) the ability of stating a mathematical problem in writing into mathematical models and doing calculation to solve the problem. The result found from this research is there are the differences in the students’ way of answering the problem even though the learning model and the instrument used is same.

ANALYSIS OF STUDENTS’ LEARNING OBSTACLES ON LEARNING INVERS FUNCTION MATERIAL Krisna Satrio Perbowo; Restu Anjarwati
Jurnal Infinity Vol 6, No 2 (2017): VOLUME 6 NUMBER 2, INFINITY
Publisher : IKIP Siliwangi and I-MES

This research is based on the presence of obstacle in learning mathematics on inverse function. This research aims to analyze the learning obstacle, to know the types of error that is suffered by the students in learning inverse function. Kind of this kualitative research descriptive with data triangulation. The research subjects are high school students which is contained of 74 students and was taken 6 students to be main sample. The data of students’ error is obtained from the writen test result, the students’ false answers are identified into the type of error. Then it was chosen several students to be interviewed. Which the analysis result finding data in this research showed there are 4 types of errors, which are concept error, procedure error, counting error and concluding error. An obstacle which appear in learning inverse function is influenced by two factors, i.e internal factor and eksternal factor. Internal factor is showed by the students’ motivation in following learning and students’ skill in receiving learning material. While the eksternal factor is showed by the curriculum which applied in school with acceleration class caused many narrow learning time, teaching materials that is less complete with the discussion of question sample.

THE ANALYSIS OF DIAGNOSTIC ASSESSMENT RESULT IN PISA MATHEMATICAL LITERACY BASED ON STUDENTS SELF-EFFICACY IN RME LEARNING Khaerunisak, Khaerunisak; Kartono, Kartono; Hidayah, Isti; Fahmi, Ahmad Yusril
Jurnal Infinity Vol 6, No 1 (2017): Volume 6 Number 1, INFINITY
Publisher : IKIP Siliwangi and I-MES

This research aimed to test RME learning with an effective scientific approach to improving mathematical literacy and self-efficacy, obtaining an overview of the mathematical literacy diagnostic assessment results that has high, medium and low self-efficacy as well as student difficulties in learning RME with a scientific approach. This research using mix method concurrent embedded with the subject of research is students class VIII. The research begins with a mathematical literacy diagnostic assessment and self-efficacy inventory then performed RME learning in experimental class and conventional learning in control class. Quantitative analysis was conducted to test the effectiveness of learning and deepened with the interview as a qualitative analysis. Learning RME with a scientific approach effective is marked by the achievement of classical completeness, the proportion of students' mathematical literacy, self-efficacy and the difference in pre-post students’ mathematical literacy on RME learning better than conventional learning. The results of students’ mathematical literacy diagnostic assessment fit the criteria of self-efficacy students except for medium mathematical literacy that having high self-efficacy. Student difficulties in RME learning with the scientific approach are based on the results of mathematical literacy diagnostic assessment, namely language skills problem, the capacity to understand, create strategies, and create the algorithm.

THE DIFFERENCE OF STUDENTS’ ACHIEVEMENT IN MATHEMATICS BY USING GUIDED-DISCOVERY LEARNING MODEL AND COOPERATIVE LEARNING MODEL JIGSAW TYPE Anna Angela Sitinjak; Herman Mawengkang
Jurnal Infinity Vol 7, No 1 (2018): Volume 7 Number 1, INFINITY
Publisher : IKIP Siliwangi and I-MES

The type of this study is a quasi-experiment study with its purpose to know any difference in students’ achievement in mathematics which using the model of guided discovery learning with cooperative learning model JIGSAW type. The population of this study is all students in SMA N 3 P. Siantar. The sampling technique applied was cluster random sampling. The experimental class I that chosen is X-1 consisted of 36 students, meanwhile, the experimental class II that chosen is X-6 consisted of 36 students. The instrument used to measure the students’ mathematics achievement was an essay test. The normality test used was Lilliefor’s test, get that data is normal and the homogeneity test by using Fisher test, get that data is homogeny. The data analysis technique was t-test at the level of significance α = 5%.The study result showed that there is the difference of students’ achievement in mathematics which using the guided discovery learning model with cooperative learning model JIGSAW type in grade X SMA N 3 P. Siantar where obtained tcalculation = 2.504 at a = 0.05 and ttable = t(0.975,70)= 1.995, then tcalculation = ttable

INCREASED CAPACITY OF THE UNDERSTANDING OF THE CONCEPT AND THE ABILITY TO SOLVE PROBLEMS THROUGH THE IMPLEMENTATION OF THE MODEL OF TEACHING MATHEMATICS REALISTIC BASED ON COGNITIVE CONFLICT STUDENTS Dewi Herawaty; Rusdi Rusdi
Jurnal Infinity Vol 5, No 2 (2016): Volume 5 Number 2, Infinity
Publisher : IKIP Siliwangi and I-MES

This research aims at: 1) the influence of the implementation of the model of teaching mathematics realistic based on cognitive conflict students to the ability to understanding the concept and troubleshooting capabilities; 2) determine the larger capacity of the understanding of the concept through the implementation of the model of teaching mathematics realistic based on cognitive conflict junior secondary school students the City of Bengkulu. 3) determine the great improvement of the ability to solve problems through the implementation of the model of teaching mathematics realistic based on cognitive conflict SMP students Bengkulu City.To achieve the goal of this research is to apply Research Design pseudo experiments with research design Pretest-Postest Nonequivalent Control Group Design, with the test instrument the ability to understanding the concept and test the troubleshooting capabilities. The data has been analyzed using the test gains. The results of this research is 1) the ability of understanding the concept and troubleshooting class experiment the given learning with PMR is better than with the ability to understanding the concept and troubleshooting control classes assigned to conventional mathematics lesson; 2) increase the ability of the understanding of the concept through the implementation of the model of teaching mathematics based on cognitive conflict SMP students Bengkulu City is significant with the index gain of 0,755 (high-level); 3) increase the ability to solve problems through the implementation of the model of teaching mathematics based on cognitive conflict SMP students Bengkulu City is significant with the index gain of 0,500 level (is).

ANALYSIS OF STUDENTS' MATHEMATICAL POWER IN TERMS OF STIFIN TEST Isna Rafianti; Heni Pujiastuti
Jurnal Infinity Vol 6, No 1 (2017): Volume 6 Number 1, INFINITY
Publisher : IKIP Siliwangi and I-MES

This research is motivated by the poor performance of students in particular mathematical power. One reason is that learning tends to be centered on teachers who emphasize the procedural process, mechanistic task and less provide opportunities for students to develop the ability to think mathematically. In terms of learning, each individual has their advantages and disadvantages to absorb the lessons given. But in the world of education is now known various methods in order to meet the demands of individual differences, one of which is STIFIn to determine the dominance of machine intelligence to make students more comfortable in the learning process that is expected to enhance the mathematical power. This research approach is qualitative descriptive that seeks to analyze the characteristics of students’ mathematical power in terms of STIFIn. This research was conducted in SMAN 2 Kota Serang, with research subjects are five students of eleven grade derived from each type STIFIn different categories according to STIFIn. Instruments in this study are mathematical power test and interview. The results showed that mathematical power of Thinking and Sensing type has higher than the other type, followed by the type Feeling, Intuiting and the last is the type of Instinct.

PEMBELAJARAN KONTEKSTUAL BERBANTUAN PROGRAM GEOMETER’S SKETCHPAD DALAM MENINGKATKAN KEMAMPUAN KONEKSI DAN KOMUNIKASI MATEMATIS SISWA SMP Ishaq Nuriadin
Jurnal Infinity Vol 4, No 2 (2015): Volume 4 Number 2, Infinity
Publisher : IKIP Siliwangi and I-MES

ABSTRAK Tujuan dari penelitian ini adalah menelaah peningkatan kemampuan koneksi dan komunikasi matematik siswa SMP yang diterapkan pembelajaran kontekstual berbantuan program Geometer’s Sketchpad dibandingkan dengan siswa yang diterapkan pembelajaran konvensional, keterkaitan antara kemampuan koneksi dan komunikasi matematis, sikap siswa terhadap pembelajaran kontekstual berbantuan program Geometer’s Sketchpad, dan aktivitas siswa selama pembelajaran kontekstual berbantuan program Geometer’s Sketchpad berlangsung. Penelitian ini menggunakan desain quasi eksperimen dengan kelompok kontrol pretes dan postes. Kelompok eksperimen memperoleh pembelajaran kontekstual berbantuan program Geometer’s Sketchpad dan kelompok kontrol memperoleh pembelajaran konvensional. Untuk mendapatkan data hasil penelitian digunakan instrumen berupa tes kemampuan koneksi, komunikasi matematis dan lembar observasi. Subjek penelitian siswa SMP Negeri 3 Tangerang di Propinsi Banten dengan subjek sampel adalah siswa kelas VII sebanyak dua kelas dari sepuluh kelas yang ada dipilih secara acak. Hasil dari penelitian ini yaitu: (1)Terdapat perbedaan peningkatan kemampuan koneksi dan komunikasi matematik antara kelompok siswa yang belajar dengan menggunakan pendekatan kontekstual dibandingkan dengan siswa yang belajar dengan pendekatan konvensional; (2) Terdapat korelasi positif yang cukup antara kemampuan koneksi dan komunikasi matematik siswa; (3) Pembelajaran dengan menggunakan pendekatan kontekstual memperlihatkan motivasi dan keterlibatan siswa yang baik sehingga terbangun suatu masyarakat belajar dengan suasana yang kondusif.Kata Kunci : Pembelajaran Kontekstual, Geometer’s Sketchpad, Kemampuan Koneksi dan Komunikasi Matematis ABSTRACT The objectives of this research are to study the improvement of junior high school student’s connection ability and mathematical communication skill treated with contextual learning aided with Geometer’s Sketchpad and compared with students with conventional learning; the relationship among connection ability and mathematical communication skill, students’ attitude towards contextual learning aided with Geometer’s Sketchpad, and the students’ activity during the treatment process. The research used a quasi experiment design with pre-test and post-test control group. The experiment group was treated with contextual learning aided with Geometer’s Sketchpad, while the control group was with conventional learning. The data were gained through connection ability test, mathematical communication skill test, and observation sheet. The subjects of the research were two classes of the seventh grade students of State Junior High School 3 Tangerang, Banten, chosen randomly. The findings show that: (1) there was significant difference of improvement of connection ability and mathematical communication skill between the experiment group and the control group; (2) there was positive correlation between connection ability and mathematical communication skill; (3) the contextual learning promoted students’ motivation and involvement in the learning process, so the supportive learning condition could be easily developed.Keywords: Contextual Learning, Geometer’s Sketchpad, Connection Ability, Mathematical Communication Skill

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