SIZE INVARIANCE IN VISUAL OBJECT PRIMING OF GRAY-SCALE IMAGES

The strength of visual priming of briefly presented gray-scale picture s of real-world objects, measured by reaction times and errors in nami ng, was independent of whether the primed picture of the object was' p resented in the same size as or different size from the original pictu re. These findings replicate results on size invariance in shape recog nition, which were obtained with line drawings, and extend them to the domain of gray-level images. Entry-level shape identification is base d predominantly on scale-invariant representations incorporating orien tation and depth discontinuities which are well captured by line drawi ngs.