Principal component analysis of ICEV centered data. Left: Projection of participants on the first two dimensions of the principal component analysis, each arrow corresponds to the ratings of one participant, the color corresponds to his group formed by decomposition on latent components. Center and right: Projection of stimuli on the first two dimensions, each point corresponds to one stimulus. Point color indicates the factors Dynamic (center) and Noise (right), larger points are the centroid of the corresponding set of stimuli.