Sigit Purnomo
Senior Lecturer at Informatics Department, Universitas Atma Jaya Yogyakarta
- Yogyakarta, Indonesia
- Scholar
- Scopus
- Orcid
- Web of Science
- Researchgate
- SINTA
- Python Tutorial (ID)
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When Classical Models Compete with Deep Learning: A Semantic Label Transformation for Peer Feedback Classification
1 minute read
Published:
This study proposes a semantic priority-based label transformation for Indonesian peer feedback classification and evaluates classical machine learning and deep learning models, emphasizing model stability, generalization, and evaluation under class imbalance.
Mixed Approach Speech-to-Text Translation for Endangered Language
2 minute read
Published:
This study addresses the technological marginalization of endangered regional languages by evaluating speech-to-text translation for Dayak Ma’anyan, an extremely low-resource Austronesian language. It examines whether cascaded multilingual automatic speech recognition and machine translation models can provide effective Ma’anyan–Indonesian translation despite severe data scarcity.
Understanding Social-Cognitive-Norm Mechanisms Driving Disinformation Verification among Indonesian Young Adults on Social Media
2 minute read
Published:
This research aimed to develop an integrated theoretical model to explain the factors influencing verification behavior regarding social media disinformation among young adults in Indonesia. The model combined the Stimulus–Organism–Response (SOR) framework with the Norm Activation Model (NAM) and the Social Identity Theory (SIT) to examine the collective effects of social, cognitive, and moral processes in shaping responsible information behavior. An online cross-sectional survey was conducted with 746 respondents, who actively used social networking sites to obtain and share information. The results showed that verification behavior was primarily driven by information skepticism and personal norms, emphasizing the importance of critical thinking and moral obligation for responsible engagement. In the Organism stage, awareness of fake information, perceived deception, and critical consumption enhanced moral sensitivity and analytical reasoning. At the social level, factors such as collective memory, parasocial interaction, and status-seeking were reported to be significant identity-based stimuli in shaping cognitive and moral responses, with gender found to moderate these effects. Thematic analysis suggested that most young adults verified information through cross-checking and peer consultation, but were influenced by social validation. Theoretically, this research contributed to disinformation research by framing verification as a cognitive-normative process rather than a reactive behavior. Different initiatives were recommended by educational institutions, governmental bodies, and community organizations to strengthen moral reasoning, digital literacy, and civic responsibility in combating disinformation.
Automated Rubric-Based Classification of Student Peer Code Review Feedback
2 minute read
Published:
This study examines automated approaches for classifying student peer code review feedback in Bahasa Indonesia according to rubric-based code quality categories. The study used 2,281 student feedback items collected from peer code review activities in an introductory programming course. The dataset was annotated into seven labels and validated with strong inter-rater agreement. Three approaches were compared: classical machine learning, deep learning, and few-shot prompting using large language models. Random Forest with count vectorization produced the best performance with an F1-score of 0.9430, outperforming recurrent convolutional neural networks with FastText embeddings and few-shot prompting. The findings indicate that classical machine learning with token-based features can be an effective and interpretable baseline for supporting rubric alignment in peer code review tools, especially in computing education contexts using Bahasa Indonesia.