Table 1 Means and standard deviations of retention, comprehension and transfer scores for the three groups
| Group | M | SD | F | p | |
|---|---|---|---|---|---|
| Retention score [max = 12] | HPED (n = 27) | 7.41 | 3.66 | 3.38 | .039 |
| LPED (n = 26) | 9.69 | 3.32 | |||
| ND (n = 27) | 9.15 | 3.05 | |||
| Comprehension score [max = 16] | HPED (n = 27) | 8.30 | 1.79 | .83 | .439 |
| LPED (n = 26) | 8.81 | 1.17 | |||
| ND (n = 27) | 8.56 | 1.28 | |||
| Transfer score [max = 12] | HPED (n = 27) | 3.85 | 1.10 | 8.33 | .001 |
| LPED (n = 26) | 5.12 | 1.58 | |||
| ND (n = 27) | 3.85 | 1.17 |