But the researchers say they are not sure why the patterns work, though they may produce illusions to the human eye, just as moiré patterns can produce the illusion of motion.
Her study of the Pointillists, particularly Georges Seurat, led her to experiment with colour juxtaposition and optical effects, and under the influence of Victor Vasarely and others, her work took on a geometric abstraction, in which intricate patterns of black and white and, later, alternating colours were calculated to produce illusions of movement and topography.
This further suggests that there is a qualitative difference between direct electrical cortical stimulation and rTMS as a mean to produce illusions of movement.
Collyer's hypothesis may prove relevant to the perception of sequences with three or more stimulus locations, but its application to sequences with just two spatial positions, which also produce illusions (e.g., Fig. 1A), is less clear.
Anti-illusionist tactics were producing illusions.
Joy may be associated with so called Dionysiac type experiences in which wine and other substances produce the illusion of oneness with nature and others--an illusion that's quickly dispelled by the path of destruction generally left in the wake of such experiences.
"On the Origin of Species" revealed how physical processes alone produce the illusion of design.
"Recording enables me to produce the illusion that I can play.
Since the prices of such assets rarely change, that can produce the illusion of smooth returns and make hedge-fund portfolios look less risky than they are.
Vignola died before the structure was completed, but the basic plan is his: aisles subsumed in side chapels so as to produce an illusion of vast interior space.
