Table 4. 2-way ANCOVAs on the variables Mean Elevation and Lateral Exploration.
| Controlling for Dev. Age | |||||
| Source | Sum Sq. | d.f. | Mean Sq. | F | P |
| Vertical Mean (objects) | |||||
| Diagnosis | 1587.85 | 1 | 1587.85 | 15.21 | 0.000 |
| Item | 2725.92 | 3 | 908.64 | 8.70 | 0.000 |
| DevAge | 75.99 | 1 | 75.99 | 0.73 | 0.398 |
| Interactions | |||||
| Diagnosis*Item | 156.01 | 3 | 52.00 | 0.50 | 0.685 |
| Diagnosis* DevAge | 4.31 | 1 | 4.31 | 0.04 | 0.840 |
| Item*DevAge | 189.74 | 3 | 63.25 | 0.61 | 0.614 |
| Error | 5430.07 | 64 | 104.42 | ||
| Total | 10274.58 | 79 | |||
| Lateral Exploration (objects) | |||||
| Diagnosis | 239.86 | 1 | 239.86 | 18.60 | 0.000 |
| Item | 57.91 | 3 | 19.30 | 1.50 | 0.226 |
| DevAge | 86.60 | 1 | 86.60 | 6.71 | 0.012 |
| Interactions | |||||
| Diagnosis*Item | 16.86 | 3 | 5.62 | 0.44 | 0.728 |
| Diagnosis* DevAge | 15.89 | 1 | 15.89 | 1.23 | 0.272 |
| Item*DevAge | 62.72 | 3 | 20.91 | 1.62 | 0.196 |
| Error | 670.73 | 64 | 12.90 | ||
| Total | 1169.70 | 79 | |||
*
lines in bold correspond to significant effects.