Abstract
The object of this study was to research the mediator role of professional self – efficacy belief between psychological safety and self – reported personal initaitive. Additionaly, self – reported personal initiative scale was adapted to Turkish. Firstly, pilot study was conducted to 100 occupational safety specialists to test psychometrics of self – reported personal initiative scale. Then, psychological safety, professional self – efficacy belief of occupational safety specialists and self – reported personal initiative scales were sent to occupational safety specialists with anonymous link. Similiar with pilot study, convenience method was used. Of 443 responses, 111 responses were disregarded because of the missing data and remaining 332 responses data was used for this study. According to correlation analysis results, there are significant relationships amongst psychological safety, professional self-efficacy belief and self-reported personal initiative. Regression analysis showed that professional self – efficacy belief has mediator role between psychological safety and self – reported personal initiative. Additionaly, psychometrics results of self - reported personal initiative showed that adapted scale was valid and reliable for Turkish sample.

Keywords
Psychological safety, self – efficacy belief, personal initiative, occupational safety