This research want to analyze the nature element effect on employee’s task performance with the mediation effect of fatigue and cognitive failure distractibility. Variables used in this study is nature element and organization culture as the independent variables. This research also adopt fatigue as the mediator variable for the independent relation toward dependent variable. Cognitive failure distractibility as the mediator variable for fatigue relation toward task performance as the dependent variable.

This research use sample of 103 white-collar employees that work in the central area of Taichung during the period of spring that chosen using purposive sampling method. Data collected through the subjective measurement instrument questionnaire and the collected data will be analyzed through Structural Equation Modeling (SEM) path analysis to determine the variables relationship towards each other. Research application will be used to predict the outcome is AMOS 18 and SPSS 22.0 version.

Statistics results show that nature element, fatigue, and distractibility have significant negative relation with task performance. As for organization culture has significant positive relation with task performance, but fatigue intervention causes organization culture become negatively related to task performance and nature element become positive related to task performance. Cognitive failure distractibility mediation intervention also lead the fatigue from negative relation become positively related to task performance.

Keywords: Nature Element; Organizational Culture; Fatigue; Cognitive Failure Distractibility; Task Performance