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All Journal Mutiara : Jurnal Ilmiah Multidisiplin Indonesia Jurnal Penelitian Pembelajaran Fisika
Melyani
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Humanities Economics, Econometrics & Finance Education Languange, Linguistic, Communication & Media Physics Social Sciences Other

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Pengaruh Lingkungan Kerja dan Stres Kerja terhadap Produktivitas Kerja Karyawan Studi Kasus pada PT. Telkom Witel Bekasi Chintya Aprilianti; Melyani
Mutiara: Jurnal Ilmiah Multidisiplin Indonesia Vol. 2 No. 4 (2024): JIMI - OKTOBER
Publisher : PT. PENERBIT TIGA MUTIARA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.61404/jimi.v2i4.330

Abstract

The purpose of this study is to understand how work stress and work environment affect employee work productivity simultaneously and proportionately. The purpose of this case study is to determine the important variables that cause the productivity of PT. Telkom Witel Bekasi's workers. In this case study, a saturated sampling method is used, which means that each member of the population is used as a sample from a relatively small population. The study involved 47 workers. Validity, reliability, linear multiple regression, and classical assumptions such as normality, heteroscedasticity, and multicollinearity are used. The hypothesis was then tested with the F and T tests.  Data was collected through questionnaires. The results of the hypothesis test show that stress and the work environment have a positive and significant impact on employee performance. The results of multiple regression analysis also show that stress and work environment have a positive and significant effect on productivity. In addition, hypothesis tests show that there is a positive and significant impact on employee work productivity greatly increased. Therefore, companies must always reduce stress in the workplace, even create a more stress-free environment, and build a better working atmosphere to increase employee productivity.
Application of PBL Model Differentiated Learning to Improve Critical Thinking Skills in Work and Energy Materials in Junior High School Melyani; Stepanus Sahala Sitompul; Syaiful B Arsyid
Jurnal Penelitian Pembelajaran Fisika Vol. 16 No. 1 (2025): JANUARY 2025
Publisher : Program Studi Pendidikan Fisika, Universitas PGRI Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26877/jp2f.v16i1.1386

Abstract

This study aims to test the effect of the application of the Problem Based Learning (PBL) learning model based on differentiated learning on the improvement of students' critical thinking skills in work and energy materials at SMP Negeri 2 Selakau Timur. This study uses a quantitative method with a pre-experimental experiment design, namely by using one pretest-posttest group. The results of the study show that the application of the PBL model based on differentiated learning is able to significantly improve students' critical thinking skills. The average score of the pretest students was 17.25, while after the implementation of PBL learning, the posttest score increased to 84.83. This increase is evident with an N-gain value of 0.81, which indicates a high category of improvement. In addition, the implementation of differentiated learning with the PBL model reached an average of 90-92%, indicating that the learning went well and as expected. Based on the results of this study, it can be concluded that differentiated learning with the PBL model is effective in improving students' critical thinking skills, especially in work and energy materials.
Co-Authors Chintya Aprilianti Stepanus Sahala Sitompul Syaiful B Arsyid