标题：Investigation of Effect of Routine Introduction, Imagery and Mixed Methods on Performance and Mental Representation of Volleyball Overhand Float-Serve
摘要：The purpose of this study was to investigate the effect of routine introduction, imagery and mixed methods on performance and mental representation of volleyball overhand float-serve. To this purpose, 40 girls were randomly divided into routine introduction, imagery, mixed and control groups. After a pre- test, participants practiced the task for seven consecutive days (each day 5 blocks 10 trials each) according to their grouping. One week after the last practice session, participants performed the post- test. Results showed that mixed group performed better than two other experimental groups. Also, routine introduction group outperformed than imagery group. However, in mental representation measure, the imagery group had a more structured mental representation than two other groups. In addition, the mixed group had a more structured mental representation than routine introduction group. These results were discussed in relation to the underlying mechanisms of these methods of practice.
