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All Journal Journal of Educational, Health and Community Psychology Edukasi Intuisi Developmental and Clinical Psychology Educational Psychology Journal Dinamisia: Jurnal Pengabdian Kepada Masyarakat Jurnal Ilmu Perilaku BERNAS: Jurnal Pengabdian Kepada Masyarakat Journal of Psychological Perspective Jurnal Pengabdian UNDIKMA Jurnal Kependidikan: Jurnal Hasil Penelitian dan Kajian Kepustakaan di Bidang Pendidikan, Pengajaran dan Pembelajaran Prosiding Konferensi Nasional PKM-CSR Jurnal Puruhita Nusantara Journal of Behavioral and Social Science Jendela Akademika: Jurnal Pengabdian kepada Masyarakat Educational Psychology Journal
Fatma Kusuma Mahanani, Fatma Kusuma
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Adaptasi Functional Assertiveness Scale pada Mahasiswa di Indonesia Nadine Salsabila Anandita; Fatma Kusuma Mahanani; Takashi Mitamura
Jurnal Kependidikan : Jurnal Hasil Penelitian dan Kajian Kepustakaan di Bidang Pendidikan, Pengajaran, dan Pembelajaran Vol. 12 No. 3 (2026): September (IN PRESS)
Publisher : LPPM Universitas Pendidikan Mandalika

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33394/jk.v12i3.20738

Abstract

This study aims to adapt and evaluate the psychometric properties of the Indonesian version of the Functional Assertiveness Scale (FAS) (Mitamura, 2018). The scale was translated and culturally adapted following the International Test Commission Guidelines for Translating and Adapting Tests (Second Edition) (ITC, 2018), involving three translators, six expert reviewers, and 11 lay reviewers. A quantitative approach was employed, and the adapted instrument was administered to 303 Indonesian university students aged 18-23 years selected through convenience sampling. Construct validity was evaluated using Confirmatory Factor Analysis (CFA), reliability was assessed using Cronbach’s alpha coefficients, and measurement invariance across gender was examined using Multi-Group Confirmatory Factor Analysis (MG-CFA). The CFA supported the original 12-item two-factor structure, with satisfactory model fit (TLI = 0.951, CFI = 0.937, SRMR = 0.045, RMSEA = 0.051) after residual covariances were added in single-group CFA. Reliability coefficients were satisfactory for the Objective Effectiveness subscale (α = 0.803), the Pragmatic Politeness subscale (α = 0.713), and the total scale (α = 0.799). Furthermore, MG-CFA demonstrated strict measurement invariance across gender, indicating that the scale functions equivalently for male and female respondents. These findings provide evidence that the Indonesian version of the Functional Assertiveness Scale is a valid and reliable instrument for measuring functional assertiveness and supports its use in future psychological research and assessment in Indonesia.
Co-Authors Almaira, Nur Fitria Amalia, Natasya Putri Ambarita Mumpuni Anandita, Nadine Salsabila Andarini Permata Cahyaningtyas Anggita Fathidhia Ivana Anis Sholihati Arifiani, Zefi Nafira Arinata, Firdian Setiya Arinto, Bayu Asih, Triana Gusti Ayu, Sandya Sarira Bayu Wiratama, Bayu Chamila Ahda Soraya Rahma Devi Ajeng Efrilianda Dyah Ayu Rahmawati Endah Lestari Endah Sri Wahyuni Erika Noor Dianti Febriyanti, Efi Filea Suryaningtyas Fipti, Friska Ulfalia Firdaus, Aina Aulia Hafsari, Najwa Lintang Insyiroh, Nafia Ira Paramastri Julian Adrian Halim Kharisma Juliana Simorangkir Krisnawati, Rifqi Nurrahma Kurniana Bektiningsih Liftiah Liftiah Margereta, Elsi Mohammad Iqbal Mabruri, Mohammad Iqbal Mukhlis Mukhlis Muna, Trimurtini, Nur Aizatun Nadine Salsabila Anandita Noury, Adebba Ramadhanti Nugraheti Sismulyasih SB, Nugraheti Sismulyasih Nursiwi Nugraheni Pradipta Christy Pratiwi Prasetiani, Artika Adi Prastiwi, Shyam Bella Pundani Eki Pratiwi Putri Amalia Putri Dea Agestasia Putri, Vika Suryani Rahmawati Prihastuty Rahmawaty, Anik Rizki, Binta Mu'tiya Rizki, Binta Mu’tiya Rizky, Ravellia Ayu Said, Noor Sarifa, Aprilia Wira Sholihah, Warotsatus Simatupang, Rambo Siti Badriyah Sri Maryati Deliana, Sri Maryati Sugiariyanti, Sugiariyanti Sugiyarta Stanislaus, Sugiyarta Sukma Adi Galuh Amawidyati Sukma Adi Galuh Amawidyati Takashi Mitamura Tiatira Evangelista Tri Esti Budiningsih Tri Esti Budiningsih Ulya, Laila Listiana Vika Suryani Putri Wardhana, Deo Dwi Kusuma Zian, Toriqul