Figure 3.

Model-based estimates for each grader and trial are presented along with standard errors. These plots illustrate the learning over time effect for ONL and HFL for both the normal and albinism subjects. Open circles are from grader 1, crosses are from grader 2, and open triangles are from grader 3. F statistics for each grader are provided in each panel, along with the corresponding P value. No significant learning effect was seen in the albinism data, whereas significant learning effects were seen for the ONL and HFL measurements from normal. Note that the range on the y-axis is the same for each plot in magnitude but shifted to be roughly centered on the data for each metric. This was done to focus on differences between graders and trials and not necessarily to facilitate comparisons of the absolute value of the HFL or ONL thicknesses between albinism and normal (which is detailed in Fig. 4).