Eye-tracking analyses.

<p>(A) Pattern of fixations/saccades revealed in relation to the “cannon” stimulus (left) and its underlying POI map (right). (B) Pooled fixations on all stimuli as a function of visibility for a subject performing the ascending (left) and one performing the descending protocol (right). (C) Average fixation spread (distance from image center). (D) Fixation count, normalized per subject. (E) Fixation duration. (F) Average local contour density (computed from POI map) in areas of 0.5° in diameter around explored locations corresponding to fixations on the dot stimulus. (G) Integrated dot displacement, computed as a sum of displacements of dots (in areas of 0.5° in diameter around each fixation) relative to the undeformed lattice. The sum runs over all fixation locations in the trial. Error bars represent s.e.m.</p

Psychometric curves, subjective and objective thresholds.

<p>Psychometric curves grouped by response type (A) and by verbal report accuracy (B) as a function of visibility (<i>g</i> value) and experimental condition (ascending and descending). (C) Thresholds for sigmoidal response curves corresponding to “Seen” (subjective) responses (left) and correct (objective) verbal responses (right). Error bars represent s.e.m.</p

Detection and recognition of individual objects.

<p>(A) Borders between “Nothing”/“Uncertain” (detection) and “Uncertain”/“Seen” (recognition) computed on individual objects, for the ascending (left) and descending (right) conditions. Error bars are s.e.m. (B) Average and SD of detection and recognition borders from (A) across all objects. (C) Individual object detection and recognition borders in the descending versus ascending condition.</p

Exploration time estimated by measuring reaction time as a function of response type in the two experiments.

<p>Error bars represent s.e.m.</p