Articles

Validation of Applied Mathematics Exam Test Using Rasch Model Approach: Case Study in Diploma 3 Study Program of Refrigeration and Air Conditioning Engineering Politeknik Negeri Bali

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This study validates the Applied Mathematics exam (AME) test on Diploma 3 (D3) Study Program of Refrigeration and Air Conditioning Engineering (RACE), Politeknik Negeri Bali (PNB) to determine the validity, reliability, unidemensional, level of difficulty, and discriminatory power of the test. Validation uses the modern test theory approach of the Rasch model. Data were collected during the online final exam of the even semester of the 2023/2024 academic year. The instrument uses a multiple-choice test form with 5 answer options. The sample involved 73 even semester students of the D3 RACE study program who took applied mathematics courses. The data collected were analyzed using the Rasch Model assisted by the Winsteps application. The results of the analysis show that the AME test has an adequate level of validity, most of the questions meet the fit criteria for the Rasch Model. The level of test reliability is categorized as very good with a person and item reliability value of 0.90. Several questions still show misfits that require improvement. Item difficulty and person ability show a proportional distribution between the level of difficulty of the questions and the students’ abilities. Overall, the test’s discriminatory power is categorized as good, although there is one question that needs to be reviewed further for improvement. The implication is that the use of the Rasch Model in validating online test instruments can help teachers in compiling questions that are more valid, reliable, and in accordance with the level of student ability. The implication is that the application of the Rasch Model in validating test instruments can help lecturers in constructing more valid and reliable tests. The results of this study can be used as an empirical example of the application of the Rasch model theory to produce more valid and reliable measurements. It is recommended that the development of future test tests really needs to pay attention to the balance between the level of difficulty of the items and the abilities of the students, and ensure that the measurements are more valid and reliable, especially in the context of polytechnic education.

Validity and Reliability of the Health Belief Questionnaire Model for Mental Health Behavior COVID-19 Survivor

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Background: Research using the Health Belief Model (HBM) is expected to be able to determine a determinant model of mental health behavior for Covid-19 survivors. The focus of HBM is Health Promotion at the individual level by looking at the protective and risk factors that are responsible for a person’s behavioral resistance. Until now there is no instrument that measures individual attitudes and beliefs based on the HBM for the mental health behavior of Covid-19 Survivors.

Method: To assess the validity and reliability of the Health Belief Model Questionnaire for Mental Health Behavior for COVID-19 Survivors. This study is an observational study with a cross sectional approach that presents the results of the validity and reliability of the Health Belief Model Questionnaire instrument for Mental Health Behavior for COVID-19 Survivors. The questionnaire was compiled as many as 16 statement items based on a literature review. The questionnaire consists of Perceptions of Seriousness, Perceptions of Vulnerability, Perceptions of Benefits, Perceptions of Barriers with 4 question items each. The sample size is 64 people. The validity test uses the Pearson Product Moment Correlation formula with a coefficient value of 0.3, while the reliability test uses internal consistency with Cronbach’s Alpha with a coefficient value of 0.7.

Results: The results of the descriptive analysis showed that the average age of Covid survivors was 18-40 years (78.1%), female (79.7%), undergraduate education level (75%), affected in wave II (54.7%) ). The results of the validity test of the 16 items contained 1 invalid item (perception of barriers), while the reliability test showed that of the 15 valid items the results were all reliable.

Conclusion: Overall, the HBM questionnaire is valid and reliable to measure mental health behavior in COVID-19 survivors.

Proposing a Research Model on Factors Affecting Customers’ Trust in E-Commerce Transactions in Binh Dinh

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Although online shopping is convenient, has many advantages, and is the trend of the times, consumers still have not put their whole trust in these goods and service providers. It is essential to study the factors affecting customer trust in e-commerce transactions. To have the basis to carry out this study, the authors have analyzed relevant research at home and abroad. On that basis, propose a model to study the factors affecting the trust of customers in e-commerce transactions in Binh Dinh province, which are: website reputation, website design, information quality, transaction safety, and social impact.