... their constant support and help The impact of employee perception on job performance with mediating role of extra -role behaviors in Vietnam motorbike market Abstract This study examines the impact. .. impact of employee perception of conscientiousness, organizational justice and organizational identification on job performance of frontline employee in the context of Vietnam motorbike retail market. .. both employee perception and extra -role behaviors as the antecedents of frontline employee job performance in the context of motorbike retail in Vietnam It is a well-known fact that employee perception