PENGARUH MODEL GUIDED DISCOVERY LEARNING (GDL) BERBANTUAN MEDIA MANIPULATIF TERHADAP KEMAMPUAN BERPIKIR GEOMETRIS DITINJAU DARI EFIKASI DIRI

DODI LESMANA, . (2026) PENGARUH MODEL GUIDED DISCOVERY LEARNING (GDL) BERBANTUAN MEDIA MANIPULATIF TERHADAP KEMAMPUAN BERPIKIR GEOMETRIS DITINJAU DARI EFIKASI DIRI. Magister thesis, UNIVERSITAS NEGERI JAKARTA.

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Abstract

Berpikir Geometris adalah kemampuan dalam memahami unsur geometri seperti titik, garis, sudut, persamaan sifat bangun serta hubungan antar bangun sehingga mampu melatih berpikir spasial, melakukan penalaran deduktif, serta menarik kesimpulan dan menyelesaikan masalah geometri dengan tepat dan logis. Penelitian ini bertujuan untuk menyelidiki dampak Model Pembelajaran Guided Discovery Learning (GDL) berbantuan media manipulatif terhadap kemampuan berpikir geometris siswa sekolah dasar dengan mempertimbangkan tinggi dan rendahnya efikasi diri siswa. Metode eksperimental dengan desain kelompok kontrol posttest-only digunakan, dengan menggunakan Cluster Random Sampling untuk memilih sampel sebanyak 124 siswa. Instrumen penelitian berupa tes kemampuan berpikir geometris yang telah divalidasi oleh dosen ahli dan kemudian diuji validitas dan reliabilitasnya menggunakan aplikasi jamovi. Hasil uji ANOVA menunjukkan perbedaan yang signifikan dalam kemampuan berpikir geometris antara kelompok eksperimen dan kelompok kontrol. Temuan menunjukkan bahwa GDL berbantuan media manipulatif secara signifikan meningkatkan kemampuan berpikir geometris siswa sekolah dasar, terbukti lebih efektif daripada model ekspositori. ***** Geometric thinking is the ability to understand geometric elements such as points, lines, angles, and the properties of shapes, as well as the relationships between shapes, thereby enabling students to develop spatial thinking, engage in deductive reasoning, and draw conclusions and solve geometric problems accurately and logically. This study aims to investigate the impact of the Guided Discovery Learning (GDL) model, supported by manipulative media, on the geometric thinking skills of elementary school students, taking into account differences in students’ self-efficacy levels. An experimental method with a posttest-only control group design was used, employing cluster random sampling to select a sample of 124 students. The research instrument consisted of a geometric thinking ability test that had been validated by expert faculty members and subsequently tested for validity and reliability using the Jamovi application. The results of the ANOVA test showed a significant difference in geometric thinking ability between the experimental group and the control group. The findings indicate that the GDL model supported by manipulative media significantly enhances the geometric thinking ability of elementary school students, proving to be more effective than the expository model.

Item Type:	Thesis (Magister)
Additional Information:	1). Dr. Puryati, M.Pd. ; 2). Dr. Mira Amelia Amri, M.Pd.
Subjects:	Pendidikan > Evaluasi Pendidikan Pendidikan > Psikologi Pendidikan Pendidikan > Pendidikan Dasar > Pendidikan Anak
Divisions:	FIP > S2 Pendidikan Dasar
Depositing User:	Dodi Lesmana .
Date Deposited:	24 Aug 2026 01:57
Last Modified:	24 Aug 2026 01:57
URI:	http://repository.unj.ac.id/id/eprint/72873

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