Stuart Anstis

Adaptation to Brightness Change , Contours , Jogging , and Apparent Motion

Stuart Anstis Frisby and Stone (2010) have dubbed adaptation the “psychophysicist’s electrode,” and John Mollon once (1974) famously said, “If it adapts, it’s there.” Psychologists piously hope that their many experiments on visual adaptation will tell physiologists where to look inside the brain. This chapter describes visual adaptation to temporal ramps, spatial edges, and apparent motion (AM...

This excerpt from The Motion Aftereffect

Motion-Driven Transparency and Opacity

When two adjacent surfaces move in step, this can generate a sensation of transparency, even in the absence of intersections. Stopping the motion of one surface makes it look suddenly opaque.

Rotating Squares Look Like Pincushions

Rotating squares appeared to be distorted into pincushions with concave sides. These illusory shape changes were caused by a perceived compression along the curved path of motion.

Orbiting Black/White Rays Produce an "Illusory" Gray Disk.

An orbiting ray pattern produces an unexpected gray disk. Here we demonstrate this visual effect and its possible insights into visual temporal integration.

Luminance contours can gate afterimage colors and "real" colors.

It has long been known that colored images may elicit afterimages in complementary colors. We have already shown (Van Lier, Vergeer, & Anstis, 2009) that one and the same adapting image may result in different afterimage colors, depending on the test contours presented after the colored image. The color of the afterimage depends on two adapting colors, those both inside and outside the test. He...