Application of the Certainty Factor Method for Diagnosing Mental Illness Disease

  • Alta Mirah STMIK Kaputama
  • Yani Maulita STMIK Kaputama
  • Magdalena Simanjuntak STMIK Kaputama


Mental illness is a disease that is widespread among Indonesian people. Mental illness, also known as mental health disorder, is a term that refers to various conditions that can affect a person's thoughts, moods, feelings or behavior. However, there are still many Indonesian people who do not recognize and indicate the existence of mental illness because many people do not pay attention to their mental health or those around them. the small number of psychiatrists available in each area and the costs required are also not small, causing ordinary people to be reluctant to carry out examinations with psychiatrists, this of course leads to delays in treatment which can even be fatal. To prevent the increase in sufferers of mental illness, a system is needed that can store the knowledge of experts or psychologists who understand how to handle mental illness. An expert expert system is an artificial intelligence program that combines a knowledge base with an inference system to emulate an expert. The certainty factor method is a method used to solve cases of uncertainty, where the size is based on a fact or rule that can be used in expert systems. With the existence of an expert system for diagnosing mental illness, the general public can recognize early symptoms of mental illness, so treatment can be done earlier. From the results of the trials conducted, the results of the mental illness expert system were obtained with the highest score, namely depression with a confidence value of 90.02%.


[1] Adani, MR (2021). Expert System_ Definition, Purpose, Structure, and Methods. In Sekawan Media.
[2] Charlson, F., van Ommeren, M., Flaxman, A., Cornett, J., Whiteford, H., & Saxena, S. (2019). New WHO prevalence estimates of mental disorders in conflict settings: a systematic review and meta-analysis. The Lancet, 394(10194).
[3] Djahir and Pratita. (2015). Definition of Data Dictionary. Definition of Data Dictionary.
[4] Jannah, M., Sarwandi, & Creative, C. (2019). Proficient in PHP Programming Language. In Elex Media Komputindo.
[5] Kadarsih, K., & Andrianto, S. (2022). JTIM : Journal of Informatics Engineering Masterpiece. JTIM: Mahakarya Informatics Engineering Journal, 03(2), 37–44.
[6] Kromann, FM (2018). Beginning PHP and MySQL. In Beginning PHP and MySQL.

[7] Kusumadewi Sri. (2003). Artificial Intelligence (Techniques and Applications). In GRAHA SCIENCE.
[8] Material, a. (2014). Data Dictionary (Data Dictionary). 1–13.
[9] Munawar. (2018). Object Oriented System Design Analysis with UML (Unified Modeling Language). In Bandung: Informatics.
[10] Pakpahan, M., Amruddin, A., Sihombing, RM, Siagian, V., Kuswandi, S., Arifin, R., Mukhoirotin, M., Karwanto, K., Tasrim, IW, Kato, I. , Subakti, H., & Aswan, N. (2022). Research methodology . Our Writing Foundation .
[11] Putri, GVG (2018). An expert system for diagnosing mental illness sichosis using the certainty factor method. Journal of Inovtek Polbeng - Informatics Series, 3(2), 164–168.
[12] Rosaly, R., & Prasetyo, A. (2019). Understanding Flowcharts and the Functions and Symbols of the Most Commonly Used Flowcharts.
[13] Setiawan, G. (2019). Software. Gastronomía Ecuatoriana y Turismo Local., 1(69), 5–24.
[14] Sugiarti, Y. (2013). Analysis and Design of Generated UML (Unified Modeling Language) VB.6 Accompanied by Case Study Examples and Web Interface.
[15] Suhendi, H., & Supriadi, A. (2020). Expert System for Diagnosing Anxiety Disorders Using the Website-Based Certainty Factor Method. Narrative : National Journal of Research, Applications and Informatics Engineering, 2(2), 13–23.
[16] Sukiakhy, KM, Zulfan, Z., & Aulia, O. (2022). APPLICATION OF THE CERTAINTY FACTOR METHOD TO THE WEB-BASED EXPERT SYSTEM FOR THE DIAGNOSIS OF MENTAL DISORDERS IN CHILDREN. Cyberspace: Journal of Information Technology Education, 6(2).
[17] Sutojo, T., Mulyanto, E., & Suhartono, V. (2011). Artificial Intelligence. In Journal of Chemical Information and Modeling.
[18] World Health Organization. (2020). WHO-HealthyAtHome - Mental health. Campaigns.
[19] Yasin. (2019). Understanding MySQL, Functions, and How It Works (Complete). In Niagahoster Blog.
[20] Yusuf, A. (2017). The Stigma of the Indonesian Society regarding Mental Disorders. Nursing Seminar: The Role of Nurses in Facing Trends and Issues in Mental Health, Mental Disorders.
[21] Zulfian Azmi, ST., MK, & Verdi Yasin, S. Kom., MK (2020). Introduction to Expert Systems and Methods. Media Discourse Partners.
How to Cite
MIRAH, Alta; MAULITA, Yani; SIMANJUNTAK, Magdalena. Application of the Certainty Factor Method for Diagnosing Mental Illness Disease. International Journal of Informatics, Economics, Management and Science (IJIEMS), [S.l.], v. 2, n. 2, p. 141-149, aug. 2023. ISSN 2809-8471. Available at: <>. Date accessed: 29 nov. 2023. doi:

Most read articles by the same author(s)

Obs.: This plugin requires at least one statistics/report plugin to be enabled. If your statistics plugins provide more than one metric then please also select a main metric on the admin's site settings page and/or on the journal manager's settings pages.