Models' overall usage of dimension reduction in two trial types.

<p>(a) The usage of attribute types in similarity-based scanning as a proportion of the trial's fixations sequence. (b) The changing proportion of trials in which dimension-reduction was used. The proportions are calculated as a function of the fixation position within a trial. The proportion on fixation <i>x</i> is calculated by counting the trials that have a dimension-reduction block that include fixation <i>x</i>. The lengths of blocks from word trials are also normalized to match the length scale of picture trials.