4 research outputs found
When here becomes there: attentional distribution modulates foveal bias in peripheral localization
Much research concerning attention has focused on changes in the perceptual qualities of objects while attentional states were varied. Here, we address a complementary question—namely, how perceived location can be altered by the distribution of sustained attention over the visual field. We also present a new way to assess the effects of distributing spatial attention across the visual field. We measured magnitude judgments relative to an aperture edge to test perceived location across a large range of eccentricities (30°), and manipulated spatial uncertainty in target locations to examine perceived location under three different distributions of spatial attention. Across three experiments, the results showed that changing the distribution of sustained attention significantly alters known foveal biases in peripheral localization
Effects of syntactic context on eye movements during reading
Previous research has demonstrated that properties of a currently fixated word
and of adjacent words influence eye movement control in reading. In contrast to
such local effects, little is known about the global effects on eye movement
control, for example global adjustments caused by processing difficulty of
previous sentences. In the present study, participants read text passages in
which voice (active vs. passive) and sentence structure (embedded vs.
non-embedded) were manipulated. These passages were followed by identical target
sentences. The results revealed effects of previous sentence structure on gaze
durations in the target sentence, implying that syntactic properties of
previously read sentences may lead to a global adjustment of eye movement
control
The perceived onset position of a moving target: Effects of trial contexts are evoked by different attentional allocations
Perceptual judgment and saccadic behavior in a spatial distortion with briefly presented stimuli.
When observers are asked to localize the peripheral position of a small probe
with respect to the mid-position of a spatially extended comparison stimulus,
they tend to judge the probe as being more peripheral than the mid-position of
the comparison stimulus. This relative mislocalization seems to emerge from
differences in absolute localization, that is the comparison stimulus is
localized more towards the fovea than the probe. The present study compared
saccadic behaviour and relative localization judgements in three experiments and
determined the quantitative relationship between both measures. The results
showed corresponding effects in localization errors and saccadic behaviour.
Moreover, it was possible to estimate the amount of the relative mislocalization
by means of the saccadic amplitude