• Publications
  • Influence
Pseudoneglect: a review and meta-analysis of performance factors in line bisection tasks
An exhaustive qualitative (vote-counting) review is conducted of the literature concerning visual and non-visual line bisection in neurologically normal subject populations, which indicates a significant leftward bisection error in Neurologically normal subjects. Expand
Visuospatial attention in line bisection: stimulusmodulation of pseudoneglect
Congruencies strongly support the notion that neglect and pseudoneglect are phenomena that are twin manifestations of parameter changes in a unitary set of underlying hemispheric attentional asymmetries. Expand
A multiscale spatial filtering account of the White effect, simultaneous brightness contrast and grating induction
An oriented DOG (ODOG) model is introduced which differs from the DOG model in that the filters are anisotropic and their outputs are pooled nonlinearly and argues strongly that the induced brightness phenomena of SBC, GI, the White effect and the Todorovic demonstration, primarily reflect early-stage cortical filtering operations in the visual system. Expand
A spatial frequency dependent grating-induction effect
  • M. McCourt
  • Medicine, Physics
  • Vision Research
  • 31 December 1982
Observations indicate that the neural locus of this induction effect is cortical, lying at or beyond the level of spatial frequency selective channels, and square wave inducing gratings produce weaker induction effects than sinewave inducing gratINGS of the same spatial frequency and contrast. Expand
Right hemisphere control of visuospatial attention: line-bisection judgments evaluated with high-density electrical mapping and source analysis☆
It is shown that the line-bisection effect systematically tracks/follows the latency of the N1 component, which is considered a temporal marker for object processing in the ventral visual stream, suggesting that this task invokes an allocentric (object-based) form of visuospatial attention. Expand
A unified theory of brightness contrast and assimilation incorporating oriented multiscale spatial filtering and contrast normalization
The oriented difference-of-Gaussians (ODOG) computational model of Blakeslee and McCourt parsimoniously accounts for the psychophysical data, and illustrates that mechanisms based on junction analysis or perceptual inference are not required to explain some brightness effects, such as the White effect. Expand
Cognitive and perceptual influences on visual line bisection: Psychophysical and chronometric analyses of pseudoneglect
It is concluded that scanning eye and/or gross limb movements do not account for pseudoneglect, and that a significant component must be purely perceptual, as well as Chronometric and psychometric measures of pseud oneglect. Expand
Performance consistency of normal observers in forced-choice tachistoscopic visual line bisection
  • M. McCourt
  • Medicine, Psychology
  • Neuropsychologia
  • 31 December 2001
It is concluded that forced-choice tachistoscopic line bisection measures are highly reliable; a mean correlation of +0.87 exists between mean error based on 15 trials and means estimated from a random sample of only two trials. Expand
Asymmetries of Visuospatial Attention are Modulated by Viewing Distance and Visual Field Elevation: Pseudoneglect in Peripersonal and Extrapersonal Space
Evidence is found for independent spatiotopic (viewing distance) and retinotopic (line elevation) effects on line bisection performance in normal observers, suggesting that the allocation of visuospatial attention is modulated within multiple frameworks. Expand
Quantifying the Importance of Image and Perception to Bus Rapid Transit
This study was designed to quantify the importance of image and perception to Bus Rapid Transit (BRT), by identifying the different underlying tangible and intangible factors that drive any perceivedExpand