| Keyboard-A |
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| Source of variation | SS | DF | MS | F | Post-hoc |
| Between Groups | 90.636 | 3 | 30.212 | 24.982*** | 2 > 1 > 3 2 > 1 > 4 |
| Within Groups | 4957.103 | 4099 | 1.209 | ||
| Total | 5047.739 | 4102 |
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| Keyboard-B |
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| Source of variation | SS | DF | MS | F | Post-hoc |
| Between Groups | 85.856 | 3 | 28.619 | 25.297*** | 1 > 3, 1 > 4, 2 > 3, 2 > 4 |
| Within Groups | 4639.587 | 4101 | 1.131 | ||
| Total | 4725.443 | 4104 |
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| Keyboard-F |
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| Source of variation | SS | DF | MS | F | Post-hoc |
| Between Groups | 316.051 | 3 | 105.350 | 102.484*** | 1 > 3, 1 > 4, 2 > 3, 2 > 4 |
| Within Groups | 5296.771 | 4103 | 1.291 | ||
| Total | 5612.822 | 4106 |
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| Keyboard-L |
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| Source of variation | SS | DF | MS | F | Post-hoc |
| Between Groups | 163.969 | 3 | 54.656 | 64.657*** | 1 > 2 > 4 > 3 |
| Within Groups | 4599.659 | 4105 | 1.121 | ||
| Total | 4763.629 | 4108 |
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