The Development of the Validated Instruments to Assess the Ability of the 9th Graders in Solving Diagnostic Geometry Problem in Two Characteristic Classes
Year: 2023
Type: conference-paper
Abstract: This study aims to develop a diagnostic test for evaluating the ability of the 9 th graders junior high school students in solving geometry problems.The instruments utilized include the Initial Ability Test (IAT) and the Geometry Problem Solving Test (GPST).Before being given to the participants, the research instruments were validated by three senior lecturers holding doctoral degrees in mathematics education.Furthermore, the readability test was conducted by two math teachers and two students from a public junior high school in Surabaya.After that, 45 students of both grades mentioned above were asked to work on both tests in two consecutive days.The participants were grouped into high math ability groups, medium math ability groups, and the low math ability group.Based on these results, IAT and GPST was found to be valid, reliable, significantly easy (IAT) and moderate significant (GPST), and very good discriminating power.More specifically, with t-test and significance level 훼 = 0.05, the results on IAT confirm that there is no significant difference between the scores of the two classes, which have significantly different characteristics.Whereas in GPST there is a significant difference between the scores of the two classes.Thus, from the assessment of the validator and the analysis of the test items, both instruments are categorized as valid and can be used to evaluate the ability of the 9 th graders junior high school students in solving geometric problems.Instruments that have been validated will be tested for a larger population with expanded materials.
Authors: Ovan, Yusuf Fuad, Mega Teguh Budiarto
Institution: Universitas Negeri Surabaya
Language: English
Subfield: Education
Field: Social Sciences
Domain: Social Sciences
SDG: Quality education
Open Access status: diamond
OpenAlex ID: W4389924237