FROM IMPOSSIBLE TO POSSIBLE THANKS MOTION: A NEW TRANSPARENCY EFFECT
In the present study we show the first case of a motion pattern eliciting a transparency perception without stratification indexes and plausible colors combination for transparency. In the first experiment we show that this transparency perception is perceived when colors combinations are plausible but also implausible with transparency. Three changing in width juxtaposed surfaces, which do not present any stratification cues, are perceived as a moving transparent square that covers/uncovers a second square both when the greyscale colour combination is plausible or implausible with the transparency rules. In the second experiment we manipulate speed (i) and shape of surfaces (ii). The speeds of the juxtaposed surfaces were now implausible with two moving squares; (ii) The heights of the surfaces were now also implausible with two moving squares. Data show that transparency is effected by the shape but not by the speed of the juxtaposed surfaces.