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All Journal Jurnal Pendidikan Matematika Jurnal Elemen
Sri Adi Widodo
(SCOPUS ID: 57196328078), Universitas Sarjanawiyata Tamansiswa, Yogyakarta
Education Mathematics Other

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Thinking Process of Concrete Student in Solving Two-Dimensional Problems Sri Adi Widodo; Ambar Dana Pangesti; Istiqomah Istiqomah; Krida Singgih Kuncoro; Tri Astuti Arigiyati
Jurnal Pendidikan Matematika Vol 14, No 2 (2020)
Publisher : Universitas Sriwijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22342/jpm.14.2.9460.117-128

Abstract

The purpose of this research was to find out the thinking processes of a concrete student in solving two-dimensional problems. The research method used is descriptive qualitative. The research subjects were two students taken using purposive sampling. The instrument used was the Test of Logical Operations and problem-solving tests. Stages of data analysis used are researching all data, making a cognitive classification of students, choosing concrete students to be used as research subjects, reviewing the results of concrete student work in solving mathematical problems, verify data and data sources that have been classified and transcribed in the presentation or exposure of data. The results showed that at the stage of understanding the problem and re-checking the answers, concrete students use the assimilation at the stage of planning to solve the problem of doing the disequilibration. At the stage of carrying out a plan to solve a problem, concrete students carry out the accommodation. During this study, it was found that students 'habits in mathematical problem-solving did not plan to solve problems, did not re-examine answers, and there were students' habits by interpreting the final results of problems. It can be concluded that the students' concrete thinking processes in solving two-dimensional problems vary according to the stages of problem-solving.
Development of Mathematical Problem Solving Tests on Geometry for Junior High School Students Sri Adi Widodo; Ibrahim Ibrahim; Wahyu Hidayat; Samsul Maarif; Fitri Sulistyowati
Jurnal Elemen Vol 7, No 1 (2021): January
Publisher : Universitas Hamzanwadi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29408/jel.v7i1.2973

Abstract

One of the cognitive skills that students must have is problem-solving ability. Therefore, a standardized test is needed to measure this ability. However, until now, the tests used to measure mathematical problem-solving ability were not standardized. This research aims to develop a valid and practical mathematical problem-solving test in the discussion of triangles and rectangles. This research is part of the RD 4D type with steps: Defined (analysis to develop a test), Design (designing a problem-solving test form), and Develop (expert judgment and small group trials). The instrument in this research was the validation sheet used by the validator to assess each test item. The data analysis technique used the Aiken method for expert judgment and qualitative descriptive for development testing. The result is a valid and practical mathematical problem-solving test because the V-Aiken value is more than 0.532. Based on this, the instrument can be used to measure the mathematical problem-solving ability of junior high school students in the discussion of triangles and rectangles.
Co-Authors Ambar Dana Pangesti Fitri Sulistyowati Ibrahim . Istiqomah Istiqomah Krida Singgih Kuncoro Samsul Maarif Tri Astuti Arigiyati Wahyu Hidayat