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| Pretest | First session | Midterm session | Last session | Retention test | |
|---|---|---|---|---|---|
| Concurrent feedback | 28.3 ± 6.3 | 17.7 ± 2.3 | 12.8 ± 8 | 9.3 ± 4.1 | 13.1 ± 6.9 |
| Terminal feedback | 26.7 ± 7.3 | 20.8 ± 8.4 | 18.8 ± 9.0 | 14.5 ± 6.6 | 14.4 ± 9.3 |
Unit: mm. Mean ± SD.
