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All Journal International Journal Software Engineering and Computer Science (IJSECS)
Henoch Juli Christanto
Christian University of Indonesia
Computer Science & IT

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Design Recommendations for a Child-Oriented Christian Education App Based on Usability Evidence Henoch Juli Christanto
International Journal Software Engineering and Computer Science (IJSECS) Vol. 6 No. 1 (2026): APRIL 2026
Publisher : Lembaga Komunitas Informasi Teknologi Aceh (KITA), Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35870/ijsecs.v6i1.6592

Abstract

Technology has become a routine part of children's learning, including the transmission of religious values through mobile applications. This study evaluates the usability of the Superbook Kids Bible App — a child-oriented Christian learning application — using Nielsen's five usability dimensions: learnability, efficiency, memorability, errors, and satisfaction. A descriptive quantitative survey was conducted with 100 respondents selected through purposive sampling, with sample size determined by Slovin's formula at a 10 percent margin of error. A 25-item questionnaire was validated using Pearson item-total correlations, yielding validity coefficients ranging from 0.598 to 0.824, while reliability testing confirmed good internal consistency. Descriptive results indicate moderate overall usability, with mean scores of 22.40 for learnability, 8.12 for efficiency, 8.65 for memorability, 17.76 for errors, and 14.91 for satisfaction. Category analysis identifies efficiency as the primary bottleneck, with 46 percent of respondents in the low category, followed by learnability at 33 percent, while errors were predominantly moderate at 60 percent. Based on these findings, the study proposes evidence-based design priorities: performance improvements to reduce loading and response delays, streamlined navigation to cut unnecessary steps, and guided onboarding with child-appropriate prompts to support early-stage learnability, alongside clearer feedback and error recovery mechanisms. Future research should combine task-based observation with usage analytics, test interventions such as gamification and personalization, and apply longitudinal designs to examine sustained engagement and learning outcomes in faith-based mobile learning.
Evaluation of Access by KAI Service Quality Using the E-SERVQUAL Method Henoch Juli Christanto
International Journal Software Engineering and Computer Science (IJSECS) Vol. 6 No. 2 (2026): AUGUST 2026
Publisher : Lembaga Komunitas Informasi Teknologi Aceh (KITA), Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35870/ijsecs.v6i2.7172

Abstract

Digitalization has transformed public transportation services by encouraging service providers to deliver faster, more accessible, and customer-oriented mobile applications. This study examines the electronic service quality of the Access by KAI application using the E-SERVQUAL method. The objective is to identify gaps between user expectations and perceived service performance across seven dimensions: efficiency, fulfillment, system availability, privacy, responsiveness, compensation, and contact. A descriptive quantitative approach was applied by distributing questionnaires to 100 respondents with experience using the application. Respondents were selected through purposive sampling, and each questionnaire item was measured using a five-point Likert scale for expectation and perception scores. The research instrument underwent validity and reliability testing before the data were analyzed. The results show that all E-SERVQUAL dimensions had negative gap values, indicating that perceived service quality did not fully meet user expectations. The overall expectation score was 4.61, whereas the overall perception score was 3.67, resulting in an average gap of −0.94. The largest gap was found in compensation (−1.28), followed by system availability (−1.15), responsiveness (−1.14), and contact (−1.02). These findings indicate that refund handling, ticket cancellation, failed transaction resolution, application stability, complaint response, and access to customer support are the main areas requiring improvement. The results provide practical guidance for improving digital railway ticketing services and supporting user satisfaction in Indonesia’s transportation sector.
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