Table 2.
Means (Standard Errors) for Three Measures of Spatial Variability of Fixations as a Function of Age for Observed and Randomly Grouped Data
| 1 Year | 4 Years | Adult | |
|---|---|---|---|
| BVCEA | |||
| Observed | 61.35 (.62) | 46.22 (.54) | 32.07 (.40) |
| Random | 90.17 (.54) | 86.17 (.50) | 72.16 (.40) |
| Number Clusters | |||
| Observed | 2.61 (.01) | 2.46 (.01) | 2.13 (.01) |
| Random | 3.26 (.01) | 3.39 (.01) | 3.33 (.01) |
| Biggest Cluster | |||
| Observed | 69.18 (.26) | 76.06 (.25) | 83.63 (.23) |
| Random | 57.10 (.20) | 58.60 (.21) | 62.53 (.20) |
Note. Dependent variables are the best-fit bivariate contour ellipse area (BVCEA; 10° visual angle2), the number of clusters found, and the percent of participants whose fixation landed in the dominant cluster. Randomly grouped data were generated by randomly selecting from observed fixations within each age group.