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All Journal Jurnal Psikologi Jurnal Ilmiah Psikologi Mind Set Psychological Research on Urban Society Jurnal Psikologi Forensik Indonesia
Nathanael E. J. Sumampouw
Faculty Of Psychology, Universitas Indonesia
Arts Humanities Education Immunology & microbiology Neuroscience Public Health Social Sciences Other

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Pelatihan Peningkatan Self-Esteem pada Mahasiswa Universitas Indonesia yang Mengalami Distres Psikologis Bona Sardo Hasoloan Hutahaean; Nathanael E. J. Sumampouw
Jurnal Ilmiah Psikologi MIND SET Vol 9 No 02 (2018): Desember
Publisher : Fakultas Psikologi Universitas Pancasila

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35814/mindset.v9i02.728

Abstract

Undergraduate students with high levels of self-esteem tend to have good adjustments in lectures. They will have the ability to deal with college problems and automatically reduce their psychological distress. This study used a quasi experimental method which is conducted to determine the increase of self-esteem in students who experience psychological distress. Participants of this study were 8 undergraduate students from Universitas Indonesia aged 18-23 years with a level of self-esteem below the value of 29 as measured by Rosenberg self-esteem scale (RSES), and had a level of psychological distress above the value of 1.75 as measured by HSCL-25. Participants were involved in the intervention of increasing self-esteem consisting of 5 main sessions for two consecutive days (about 6 hours a day). Four weeks after the second day of training, the participant's level of self-esteem and psychological distress were measured. The result of pre and posttest intervention showed that the participant’s mean score of self-esteem increased and the mean score of psychological distress decreased. The result of Wilcoxon test also showed a significant change in both variables (Z RSES = -2.246; Z HSCL-25 = -2.366; p < .05). This study shows that training intervention is effective in increasing the level of self-esteem and reducing the level of psychological distress for undergraduate students at Universitas Indonesia. Participants also commented that they gained new knowledge about self-esteem and new skills to communicate assertively and think positively.
From p-Values to Practical Relevance: An Introduction to Effect Sizes Through a Legal Psychological Example Riesthuis, Paul; Otgaar, Henry; Setiawan, Tery; Sumampouw, Nathanael; Bücken, Charlotte
Psychological Research on Urban Society Vol. 8, No. 2
Publisher : UI Scholars Hub

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Abstract

Null-hypothesis significance testing and p-values are frequently criticized for their focus on detecting non-zero differences and their inability to provide evidence for the null hypothesis. In this article, we highlight how effect sizes, when meaningfully interpreted, can address these issues. Specifically, we argue that researchers should consider the smallest effect size of interest (SESOI) - the smallest effect size that yields practical or theoretical relevance. We propose several methods for estimating the SESOI and present a consensus study among Indonesian professionals which can be used to estimate the SESOI for child eyewitness testimony research. Results suggest that most Indonesian professionals consider one to two memory errors sufficient to take action, such as deeming testimony unreliable. We then showed how the SESOI, combined with confidence intervals, can be used data and power analyses (e.g., minimum-effect testing, equivalence testing). Finally, we emphasize that the practical relevance of an effect size should be carefully evaluated before making policy recommendations.
Psychometric properties of The Revised Rape Myth Acceptance Scale–Indonesian version (rIRMA-Indonesian) Isa, Tsania M.; Shanti, Theresia Indira; Sumampouw, Nathanael E.J.; Agustian, Murniati
Jurnal Psikologi Vol 25, No 1 (2026): April 2026
Publisher : Faculty of Psychology, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jp.25.1.1-15

Abstract

Background: Rape myths are inaccurate beliefs that legitimize sexual violence through victim-blaming and perpetrator justification. Rape myth acceptance (RMA) is linked to sexual violence perpetration and underreporting by victims and is shaped by broader cultural norms and power relations, emphasizing the need for culturally sensitive measurement tools.Purpose: In line with Kementerian Pendidikan, Kebudayaan, Riset dan Teknologi’s 2024 PPKPT policy on preventing and addressing sexual violence in higher education, this study examines the construct validity and reliability of the Revised Illinois Rape Myth Acceptance Scale Adapted for Indonesia (rIRMA-Indonesian).Method: Using an online survey of 504 participants (ages 15–61), which includes students, lecturers, and Satgas PPKS members. Exploratory along with confirmatory factor analyses and reliability testing were conducted based on the revised three-factor rIRMA model.Findings: Results supported a theoretically coherent three-factor structure with strong internal consistency, although elevated RMSEA values and high inter-factor correlations suggested partial construct overlap.Implications: The findings indicate a culturally convergent rape myth belief system in Indonesia shaped by gender, moral norms, and authority structures, while the rIRMA-Indonesian provides an empirically grounded tool for higher education institutions and policymakers under the PPKPT framework.Limitations: Model fit concerns and cultural convergence across factors indicate the need for further culturally informed refinement beyond item reduction.
Psychological Expert Witness Work in Indonesia Arbiyah, Nurul; Sumampouw, Nathanael; Otgaar, Henry
Psychological Research on Urban Society Vol. 9, No. 1
Publisher : UI Scholars Hub

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Abstract

In the current manuscript, we describe how forensic psychology evolved in Indonesia in research and practice settings and how psychologists work as expert witnesses in legal cases. We performed a literature search using SINTA (the portal of Indonesian accredited journals) to retrieve publications on "Forensic Psychology," "Legal Psychology," or "Law Psychology" to search for papers in Indonesian journals. We also explored relevant publications about forensic psychology in Indonesia in international journals using the Web of Science (WoS) database, which showed findings concerning the lack of publication. Additionally, a literature search using WoS resulted compared with other areas of psychology in Indonesia, forensic psychology research is lagging. Additionally, we conducted semi-structured interviews with five APSIFOR members, asking about their experiences as psychological expert witnesses in Indonesia, the policies governing their work, their challenges, and recommendations for improving their work. Lastly, we illustrate two significant cases that call for serious attention to the development of forensic psychology in Indonesia. We conclude by providing several recommendations for improving Indonesian psychological expert witness work, emphasizing the importance of clear guidelines and standards, establishing a forensic psychology education program, conducting additional research, and increasing the competence of psychological expert witnesses. Keywords: Forensic psychology, legal psychology, psychological expert witness, legal context, Indonesia
Wawancara Forensik Anak Saksi Korban Kekerasan Seksual dengan Protokol NICHD versi Bahasa Indonesia Nathanael Sumampouw; Cut Kemala; Retno Pudjiati
Journal Psikologi Forensik Indonesia Vol. 2 No. 1 (2022): Volume 2 No 1, Tahun 2022
Publisher : Asosiasi Psikologi Forensik (Apsifor)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.71088/jpfi.v2i1.24

Abstract

Riset empirik di beberapa negara menunjukkan kesulitan upaya penegakan hukum pada kasus kekerasan seksual terhadap anak (KStA), ditandai dengan rendahnya jumlah berkas kasus yang dinyatakan lengkap untuk diajukan ke persidangan. Hal ini terjadi karena pada KStA cenderung tidak terdapat saksi, kualitas alat bukti fisik yang rendah dan adanya penyangkalan dari tersangka. Konsekuensi dari kondisi tersebut menuntut upaya penegakan hukum mengandalkan pada kredibilitas keterangan anak saksi korban. Sehingga wawancara forensik terhadap saksi korban KStA sangat krusial dalam upaya penegakan hukum. Artikel ini bertujuan untuk mempromosikan pentingnya penerapan protokol wawancara NICHD (National Institute of Children Health and Development) yang berbasis bukti pada KStA. Protokol NICHD versi Bahasa Indonesia ini telah diujicobakan dalam kegiatan pelatihan polisi penyidik di dua unit pengaduan perempuan dan anak (UPPA) di lingkup Polda Metro Jaya. Hasil uji coba menunjukkan adanya dampak positif berupa peningkatan skor pengetahuan dan keterampilan mengajukan pertanyaan setelah pelatihan dibandingkan dengan sebelum pelatihan. Protokol wawancara ini diharapkan dapat diaplikasikan oleh praktisi dalam upaya penegakan hukum dan perlindungan anak serta untuk kepentingan riset tentang penegakan hukum di Indonesia.
Co-Authors Arbiyah, Nurul Bona Sardo Hasoloan Hutahaean Bücken, Charlotte Cut Kemala Isa, Tsania M. Murniati Agustian Otgaar, Henry Retno Pudjiati Riesthuis, Paul Tery Setiawan Theresia Indira Shanti