Her thesis contains also a detailed account on the methodology for generating face-stimuli that are perceptually calibrated to form a two-dimensional similarity gradient with equal perceptual steps between faces. The methodology is an extension of work from Yue et al. (Vision Research, 2012). If you wish to use these stimuli for your experiment they are available upon request.
|Perceptually calibrated set of faces according to a simple primary visual cortex forming a circular similarity gradient. Details on their production can be read in Msc Thesis of Lea (please contact any of us for a pdf) .|