2001 年 8 巻 1 号 p. 17-26
The purpose of this study was to investigate the relationships between birth order, sibling-sex-status, sibling interactions and motivation for exercise. The subjects were 228 university students who were firstborns or secondborns.
The subjects completed the Motivation Inventory for Physical Education (MIPE) and the questionnaire assessing sibling interactions. The MIPE consists of seven subscales named as competence, affiliation need, competitive need, values, achievement motivation, activity need, and failure avoidance.
The following results were obtained: (a) In comparison with secondborns, firstborns showed significantly higher degree of motivations except for failure avoidance, (b) Factor analysis of scores on sibling interactions revealed three factors: closeness, antagonism, and comparison. Multiple regression indicated that three factors of sibling interactions explained 1-26% of the variance in MIPE scores. For example, the subjects who reported more closeness with own sibling showed high tendency to affiliation need. While the subjects who perceived antagonism to own sibling showed high tendency to failure avoidance. As for the firstborns and secondborns, different aspects were recognized as the pattern of these influences.