Table 15 Pairwise comparisons
Dependent variable | (I) Condition | (J) Condition | Mean difference (I-J) | Std. error | Sig | 95% Confidence interval for difference | |
|---|---|---|---|---|---|---|---|
Lower bound | Upper bound | ||||||
Grammar pretest score | Portfolio assessment | Self-assessment | .339 | .412 | 1.000 |  − .767 | 1.445 |
Peer assessment | .384 | .397 | 1.000 |  − .681 | 1.449 | ||
Control | .353 | .414 | 1.000 |  − .757 | 1.463 | ||
Self-assessment | Portfolio assessment |  − .339 | .412 | 1.000 |  − 1.445 | .767 | |
Peer assessment | .044 | .397 | 1.000 |  − 1.021 | 1.109 | ||
Control | .014 | .414 | 1.000 |  − 1.096 | 1.124 | ||
Peer assessment | Portfolio assessment |  − .384 | .397 | 1.000 |  − 1.449 | .681 | |
Self-assessment |  − .044 | .397 | 1.000 |  − 1.109 | 1.021 | ||
Control |  − .031 | .398 | 1.000 |  − 1.100 | 1.038 | ||
Control | Portfolio assessment |  − .353 | .414 | 1.000 |  − 1.463 | .757 | |
Self-assessment |  − .014 | .414 | 1.000 |  − 1.124 | 1.096 | ||
Peer assessment | .031 | .398 | 1.000 |  − 1.038 | 1.100 | ||
Grammar post-test score | Portfolio assessment | Self-assessment | .214 | .833 | 1.000 |  − 2.022 | 2.451 |
Peer assessment |  − 1.668 | .802 | .239 |  − 3.821 | .486 | ||
Control | 6.587 | .836 | .000 | 4.342 | 8.831 | ||
Self-assessment | Portfolio assessment |  − .214 | .833 | 1.000 |  − 2.451 | 2.022 | |
Peer assessment |  − 1.882 | .802 | .124 |  − 4.035 | .272 | ||
Control | 6.372 | .836 | .000 | 4.128 | 8.617 | ||
Peer assessment | Portfolio assessment | 1.668 | .802 | .239 |  − .486 | 3.821 | |
Self-assessment | 1.882 | .802 | .124 |  − .272 | 4.035 | ||
Control | 8.254 | .805 | .000 | 6.093 | 10.416 | ||
Control | Portfolio assessment |  − 6.587 | .836 | .000 |  − 8.831 |  − 4.342 | |
Self-assessment |  − 6.372 | .836 | .000 |  − 8.617 |  − 4.128 | ||
Peer assessment |  − 8.254 | .805 | .000 | -10.416 |  − 6.093 | ||