Table 5 Pairwise comparisons
Dependent variable | (I) Condition | (J) Condition | Mean difference (I-J) | Std. error | Sig | 95% Confidence interval for difference | |
|---|---|---|---|---|---|---|---|
Lower bound | Upper bound | ||||||
Reading pretest score | Portfolio assessment | Self-assessment | .031 | .325 | 1.000 |  − .840 | .902 |
Peer assessment | .309 | .312 | 1.000 |  − .530 | 1.147 | ||
Control | .151 | .326 | 1.000 |  − .723 | 1.025 | ||
Self-assessment | Portfolio assessment |  − .031 | .325 | 1.000 |  − .902 | .840 | |
Peer assessment | .277 | .312 | 1.000 |  − .561 | 1.116 | ||
Control | .120 | .326 | 1.000 |  − .754 | .994 | ||
Peer assessment | Portfolio assessment |  − .309 | .312 | 1.000 |  − 1.147 | .530 | |
Self-assessment |  − .277 | .312 | 1.000 |  − 1.116 | .561 | ||
Control |  − .158 | .314 | 1.000 |  − 1.000 | .684 | ||
Control | Portfolio assessment |  − .151 | .326 | 1.000 |  − 1.025 | .723 | |
Self-assessment |  − .120 | .326 | 1.000 |  − .994 | .754 | ||
Peer assessment | .158 | .314 | 1.000 |  − .684 | 1.000 | ||
Reading post-test score | Portfolio assessment | Self-assessment | .683 | .999 | 1.000 |  − 1.999 | 3.365 |
Peer assessment |  − 1.271 | .962 | 1.000 |  − 3.853 | 1.312 | ||
Control | 6.210 | 1.003 | .000 | 3.519 | 8.901 | ||
Self-assessment | Portfolio assessment |  − .683 | .999 | 1.000 |  − 3.365 | 1.999 | |
Peer assessment |  − 1.954 | .962 | .268 |  − 4.536 | .629 | ||
Control | 5.527 | 1.003 | .000 | 2.836 | 8.218 | ||
Peer assessment | Portfolio assessment | 1.271 | .962 | 1.000 |  − 1.312 | 3.853 | |
Self-assessment | 1.954 | .962 | .268 |  − .629 | 4.536 | ||
Control | 7.481 | .966 | .000 | 4.889 | 10.073 | ||
Control | Portfolio assessment |  − 6.210 | 1.003 | .000 |  − 8.901 |  − 3.519 | |
Self-assessment |  − 5.527 | 1.003 | .000 |  − 8.218 |  − 2.836 | ||
Peer assessment |  − 7.481 | .966 | .000 |  − 10.073 |  − 4.889 | ||