Abstract:
This research aims to: (1) study the levels of perceived self - efficacy, perceived organizational support, and work efficiency of employees at a power plant in Rayong Province; and (2) analyze the impact of perceived self efficacy and perceived organizational support on work efficiency of employees at the same power plant. The sample group in this study consisted of employees from all departments and divisions within the power plant located in Rayong Province. This research employed a quantitative research methodology. The data collection tool was a questionnaire, with a total of 152 sets collected. The statistical methods used to analyze the data included frequency distribution, percentage, mean, standard deviation, and multiple regression analysis. For instrument testing, content validity and the Index of Item-Objective Congruence (IOC) were assessed. The IOC scores for all questionnaire items exceeded the acceptable threshold of 0.5. Reliability testing using Cronbach's alpha revealed values ranging from 0.751 to 0.963, which indicates a high level of reliability (a Cronbachs alpha of 0.70 or above is considered acceptable). The research findings revealed that: perceived self - efficacy factors, specifically mastery experience and career advancement opportunities, had a positive and statistically significant effect on job performance at the 0.05 level