Abstract
The purpose of this study was to investigate the effects of three variables on changes in leadership functions among a group of managers.
The three variables investigated were job rotation among the managers, similarities between initial and subsequent jobs of rotated managers and the number of years of service of non-rotated managers.
We administered a leadership survey (PM leadership survey Questionnaire-Misumi, 1970) to 800 workers at a marine transportation company; the workers rated the leadership of their managers twice with a two-year interval between administrations.
The Results were as follows:
1. The group of non-rotated managers had a highter correlation to the M function than the group of rotated managers.
2. The rotated group with similar jobs showed a higher correlation to the P function than the rotated group with dissimilar jobs, but there was no significant difference between the two groups.
3. The rotated group which served for over a year in the same position showed a higher correlation to the P function than the group of rotated managers who had one year's service or less.
4. The rotated group which served for over a year, and the group with similar jobs showed higher scores on the planning factor and were rated more expert than the rotated group which served less than a year, and the group with dissimilar jobs.
5. The group of rotated managers showed a more positive change in the M function than the group of non-rotated managers, but there was non-significant difference in the P function between the two groups.
6. In the non-rotated group, the P function rose significantly in accordance with an increase in the years of service at a particular position.
