Pii: S0042-6989(97)00126-0
نویسندگان
چکیده
Three experiments are reported concerning the texture density aftereffect. The experiments address the question of how visual texture density information is encoded by examining patterns of transfer between different textures. In the first two experiments, it is shown that manipulation of spatial frequency and orientation information does not affect the direction of the aftereffect of density (reduction in perceived density), though similarity between adaptation and test textures does influence aftereffect strength. The third experiment demonstrates that adaptation to density differences in artificial textures in which spatial frequency information is held constant produces density aftereffects in naturalistic test textures in which density and spatial frequency covary. © 1997 Elsevier Science Ltd
منابع مشابه
Texture density aftereffects in the perception of artificial and natural textures
Three experiments are reported concerning the texture density aftereffect. The experiments address the question of how visual texture density information is encoded by examining patterns of transfer between different textures. In the first two experiments, it is shown that manipulation of spatial frequency and orientation information does not affect the direction of the aftereffect of density (...
متن کاملDetecting saccades with jerk
In studies of smooth eye movements, saccades are often detected and removed from eye movement records during analysis. A simple and effective method for saccade detection is described; the method uses jerk (the third derivative of eye position with respect to time).
متن کاملMolecular genetic detection of female carriers of protan defects
Females heterozygous for congenital colour vision defects are of interest because they are believed to have cone photoreceptor ratios and cone photopigments that differ from normal. We describe a molecular genetic method to identify protan carriers that involves characterizing the genes that occur in the most upstream position in each of the X-chromosome photopigment gene arrays.
متن کاملEpisodic acute hypotonia after Nd:YAG laser capsulotomy—retinal function and choroidal swelling
In a patient with uveitis who had been treated with Nd:YAG laser capsulotomy after cataract surgery, several episodes of acute hypotonia occurred which were associated with changes in clinical tests of the eye and of visual function. Immunosuppressive and immunomodulating treatment appeared to reverse the changes in intraocular pressure and normalise the test results. The significance of these ...
متن کاملImpaired Retinal Function in Young Labrador Retriever Dogs Heterozygous for Late Onset Rod-Cone Degeneration
Xenon-flash d.c.-electroretinograms were recorded from dark adapted, rod-cone degenerate homozygote affected (n = 6), heterozygote carrier (n = 3) and control retinas (n = 4) at 3 and 4 months of age, starting at 0.6 log units below control PII threshold. One log unit higher stimuli were necessary to evoke PII in heterozygote and affected retinas compared to controls. Unique to the heterozygote...
متن کامل