02) and longer recovery time (Greenlee, Georgeson, Magnussen, Harris, 1991). When observers are : Différence entre versions

Version actuelle en date du 25 janvier 2018 à 03:16

title= srep30523 When observers are asked to selectively attend to one of two spatially superimposed dot fields that differ in Rences have also been reported throughout vigilance (Maclean et al., 2009) and motion direction, the contribution of your attended field towards the resulting motion after-effect is stronger than if it weren't attended (Lankheet Verstraten, 1995). Author manuscript; readily available in PMC 2012 July 05.CarrascoPageneuronal response to an attended motion, then active circumstances would yield a largeramplitude sinusoid than passive conditions. Fig. 16 shows the direction and magnitude of the motion title= pjms.324.8942 aftereffect plotted as a function of your direction of attended motion. As predicted, consideration enhanced the deviations inside the motion aftereffect inside the direction opposite for the adapting motion. Taken with each other, these benefits imply that FBA selectively increases responses to the attended direction. Related outcomes have already been shown for superimposed gratings of diverse orientations. Selectively attending to a given color or orientation increases the extent of your corresponding aftereffects (Liu, Larsson, et al., 2007; Spivey Spirn, 2000). These studies suggest that attending to a function can result in a stronger response of a neural population tuned to that feature. 6.2.1.two. Perceptual efficiency: Many psychophysical research have demonstrated that FBA improves detection and enhances functionality. Early studies displaying that foreknowledge about spatial frequency (Davis Graham, 1981; Davis et al., 1983) and direction of motion (Ball title= fpsyg.2016.01152 Sekuler, 1981) boost process overall performance support the notion that attention reduces uncertainty about stimulus options. Later function has shown that featurebased cues can affect low-level visual sensitivity. As an example, attending selectively to dots moving in a certain path improves detection of speed increments, relative to when observers simultaneously monitor the superimposed dots moving within the opposite path (Liu, Stevens et al., 2007). Also, advance knowledge of a stimulus's function improves perception even within the absence of simultaneous distractors. By way of example, a critical-band masking paradigm has shown that precueing the orientation of a stimulus improves its detection (Baldassi Verghese, 2005), and an equivalent-noise paradigm has revealed that precueing the approximate path of moving dots improves path discrimination (Ling et al., 2009). These studies are constant with the hypothesis that interest boosts sensitivity inside the psychophysical channels that finest represent the target stimulus, and indicate variations in the way spatial interest and FBA impact orientation-tuning curves (see below, Section 6.3.two, comparing effects and mechanisms of spatial attention and FBA). six.two.two. Neurophysio.02) and longer recovery time (Greenlee, Georgeson, Magnussen, Harris, 1991). title= srep30523 When observers are asked to selectively attend to one of two spatially superimposed dot fields that differ in motion direction, the contribution of the attended field for the resulting motion after-effect is stronger than if it were not attended (Lankheet Verstraten, 1995). A different study coping with motion aftereffects showed that when observers adapt continuously to motion within a particular direction, more than which brief motion pulses of an additional path are superimposed, the path of the subsequent motion after-effect alterations if observers are essential to monitor for the pulses (Alais Blake, 1999). Depending on which on the eight `attentional' motion directions was combined with the adapting motion, smaller systematic deviations in the path of your motion aftereffect must comply with a sinusoidal pattern oscillating around 180? The authors hypothesized that if attention boosted theNIH-PA Author Manuscript NIH-PA Author Manuscript NIH-PA Author ManuscriptVision Res.