Fig. 1: Reading materials schematic by condition.

Schematic depiction of a book page in the Standard condition (top) in which the illustrations include extraneous details; the Streamlined condition (middle) in which the extraneous details were removed and only illustrations relevant to the text were retained; and the Featureless Background condition (bottom) in which the illustrations were identical to the Standard condition, however, the text was placed on a plain featureless background. Note that these are original images hand-drawn and developed by the first author of the study to schematically represent the differences among conditions. Actual images of the reading materials used in the study are not reproduced here to avoid copyright infringement. Examples of the reading materials and sample gaze patterns of children reading in each condition can be viewed in the Open Science Framework repository for the study: https://osf.io/frgw8/?view_only=42259f9134024b54bd5adae2da7f9c2a.