A subdivided path in the visual field usually appears longer than an empty path of the same
length. This phenomenon, known as the filled/empty or Oppel–Kundt illusion, depends on …

The phenomena of geometrical illusions on extent and of anisotropy of the visual field
suggest the geometric proportions of a perceived field being different from the proportions of …

In psychophysical experiments, subjects reported whether the filled part of the Oppel-Kundt
stimulus was longer than the empty one at different durations of the stimuli presentations …

In the present study, the features of summation of effects caused by contextual distracting
dots in the length-matching task (a variant of the filled-space illusion) were investigated. In …

In the filled-space (or Oppel-Kundt) illusion, the filled part of the stimulus for most observers
appears longer in comparison with the empty one. In the first two experimental series of the …

In psychophysical experiments, a perceived length matching task was performed. The
stimuli were made of two spatially superimposed illusory figures that differed in structure and …

In the present study, we tested the ability of our computational model of the filled‑space
illusion to account for data collected in experiments with stimuli comprising single‑dot …

Abstract The Oppel-Kundt illusion (OKI) belongs to the class of so-called geometric-optical
illusions: a part of the visual field, subdivided by an array of visual elements, appears larger …

The spatial interval containing some visual elements (fillers) seems to be longer than an
empty interval of the same length, and the effect persists for most observers. This illusion of …

The present study examined how asymmetrical motor symptomatology helps predict the
pattern of perceptual judgements of body-scaled aperture width in lateralised Parkinson's …