Fig. 3: Estimated weight ratios and model fits.
From: Weight illusions explained by efficient coding based on correlated natural statistics
A Mean weight ratio reported by participants (black; n = 30) for each pairing of lifted objects, with model predictions (red). Every pair of lifted objects had equal mass; estimated weight ratios greater than one indicate illusory overestimation of mass of the smaller object (the SWI). Comparisons within each panel are plotted in decreasing order of volume ratio (largest volume discrepancy on the left; equals signs (=) indicate different object pairs with equal volume ratio. Different panels show results for three sets of objects with different common masses. Error bars and shading indicate ± 1 SEM. B Within-participant SD of weight ratios, plotted as in (A). C Shape and volume of the objects.
