Example Scanpath.

<p>When no visuomotor transformation was required, aged participants (B) engaged in more scanning of the presented object than did young controls (A).</p

Viewing Window Illustration.

<p>The circular viewing window displays the underlying image in normal clarity, while the remainder of the image is heavily blurred.</p

Example Scanpath – Flip in X-Axis.

<p>When a visuomotor transformation was required, aged participants (B) seemed to have greater difficulty in adapting to the new relationship of body movement and window movement (A).</p

Average Trial Velocity.

<p>Aged participants had an overall lower mean velocity. However, there was no Age x Visuomotor interaction present. Error bars represent the standard error of the mean. *p<0.05 indicates a significant difference.</p

Average Movement Times.

<p>Overall, aged participants spent more time scanning the presented object when compared to the younger controls. Additionally, aged participants displayed a comparatively larger effect of both a flip in the X-Axis, and a flip in the Y-Axis, when compared to younger control participants, as evidenced by the significant Visuomotor Flip X Age interaction. Error bars represent the standard error of the mean. . *p<0.05 indicates a significant difference.</p

Direction of Movement (Summed X-Axis Movement – Summed Y-Axis Movement).

<p>Though not statistically significant, during an X-Axis or Y-Axis flip, the aged participants displayed more corresponding axis movement than did the younger controls. Error bars represent the standard error of the mean.</p

Number of Reversals.

<p>During an X- or Y-axis flip, the aged participants had significantly more reversals per trial than on trials when no visuomotor transformation was required. Error bars represent the standard error of the mean. *p<0.05 indicates a significant difference.</p

Stimulus Backgrounds and Time Course of Trial Events.

<p>Stimulus Backgrounds and Time Course of Trial Events.</p

Individual results of the Perceptual Grouping Task for the ASD group.

<p>Lines represent the 95% confidence interval of the typically developing group.</p

Schematic diagram showing the experimental structure.

<p>Schematic diagram showing the experimental structure.</p