Visual aftereffects of sequential perception: dynamic adaptation to changes in texture density and contrast

Two new aftereffects are described in which the comparison of successively presented textures can be affected by prior exposure (adaptation) to biased sequences. A dynamic aftereffect of texture density can be produced using changes in non-Fourier texture density (using balanced-dot textures). An an alogous dynamic aftereffect is demonstrated for texture contrast. These two effects are dissociated experimentally by the near absence of cross-adapta tion. Evidence is also presented that the density effect is not one of text ure motion (e.g. expansion/contraction of texture) (C) 2001 Elsevier Scienc e Ltd. All rights reserved.