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Summary of Article Themes.
| Social Agent | Theme | No. of Studies |
|---|---|---|
| Family and peers | Reasons for/barriers to participation | 13 |
| Social norms | 8 | |
| Achievement motivation | 24 | |
| Family | Structure | 3 |
| Sporting family | 15 | |
| Parent support | 20 | |
| Peers | Friendships | 5 |
| Teammates | 11 | |
| Variable | Multiple | 6 |
