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Pre-test performance and performance change (mean ± SEM) in the size of the visual span for the control group and the two training groups.
| Pre-test (bits) |
Post-pre difference |
Retention-pre difference |
|
| Control | 29.17 ± 1.18 | 2.28 ± 0.44 | / |
| With-repetition | 27.52 ± 0.88 | 7.31 ± 1.01 | 5.46 ± 1.01 |
| Without-repetition | 28.91 ± 0.96 | 6.69 ± 0.66 | 7.33 ± 1.01 |
For the without-repetition group, retention/pre difference was calculated based on the five observers who returned for the retention-test.
