Figure 7.

Release from fixation. In 300 interleaved 4-s trials, a subject was asked to fixate or allowed to move her eyes, with short lines of text to read in order to evoke saccades. The stimulus consisted of binary white noise modulations of a dartboard pattern across a 69° × 41° field. Trace arrays are shown in (A) (fixation) and (E) (non-fixation). Examples of 10 trials are shown in (B), (C), (F), and (G) for eye position records (green is horizontal and orange is vertical) and raw electrode signals (red is from right eye and blue from left eye). Convergence to the final kernels is illustrated in (D) and (H), showing the correlation of each kernel after each trial with the kernel after the final trial. There were 161 fixation trials and 139 non-fixation trials, so convergence times were about half of what is indicated in (D) and (H).