| Rater | Type | Test | Mean | SD | Std. Error Mean | T-Value | Sig. |
| | Content | Pre. | 21.16 | 2.836 | 0.366 | 2.023 | 0.048 |
| Post. | 21.60 | 2.398 | 0.310 | ||||
| Coherence | Pre. | 21.46 | 2.582 | 0.333 | 5.010 | 0.000 | |
| Post. | 22.49 | 2.164 | 0.279 | ||||
| Non-Twitter | Content | Pre. | 16.90 | 5.384 | 0.695 | 1.406 | 0.165 |
| Post. | 17.63 | 5.648 | 0.729 | ||||
| Coherence | Pre. | 15.94 | 6.118 | 0.790 | 1.396 | 0.168 | |
| Post. | 16.86 | 6.593 | 0.851 |