Line bisection in normal adults: direction of attentional bias for near and far space

Varnava, Alice; McCarthy, Marie; Beaumont, J. Graham

doi:10.1016/s0028-3932(01)00204-4

Cited by 72 publications

(82 citation statements)

References 47 publications

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“…This indicates that bias shifted rightwards with increased viewing distance, consistent with previous results using the landmark task (Bjoertomt et al, 2002;McCourt & Garlinghouse, 2000) and line bisection task (Gamberini et al, 2008;Longo & Lourenco, 2006Lourenco & Longo, 2009;Lourenco et al, 2011;Varnava et al, 2002). Behavioural data from landmark judgments.…”

Section: Behavioural Datasupporting

confidence: 89%

“…Studies investigating line bisection in near and far space have typically found a small leftward bias in near space and a (somewhat larger) rightward bias in far space (e.g., Ferrè et al, 2013;Gamberini et al, 2008;Longo & Lourenco, 2006Lourenco & Longo, 2009;Lourenco et al, 2011;Varnava et al, 2002). In contrast, studies using the landmark task have found a leftward bias in near space and a smaller leftward bias (or no bias at all) in far space (e.g., Bjoertomt et al, 2002Bjoertomt et al, , 2009McCourt & Garlinghouse, 2000; this study).…”

Section: Differences Between Landmark and Bisection Tasksmentioning

confidence: 50%

“…At each combination of participant, time point, channel, and task, we calculated the linear regression coefficient, regressing mean voltage on viewing distance. The logic of this analysis is analogous to the use of regression to investigate changes in lateral attentional biases with viewing distance as in the current study with the landmark task and previous studies using overt line bisection (e.g., Longo & Lourenco, 2006Lourenco & Longo, 2009;Lourenco et al, 2011;Varnava et al, 2002). By thus regressing voltage on viewing distance, the time-course and scalp-distribution of neural responses modulated by viewing-distance can be assessed and compared between the landmark and colour tasks.…”

Section: Regression Analysesmentioning

confidence: 95%

“…Given that leftward biases on bisection and landmark tasks (i.e., pseudoneglect) are reduced or eliminated when stimuli are presented far from participants (e.g., Longo & Lourenco, 2006;McCourt & Garlinghouse, 2000;Varnava et al, 2002), Longo and Lourenco (2006) proposed that pseudoneglect may reflect representations of near space in the right parietal cortex. On this interpretation, the closer stimuli are presented to participants, the more strongly activated these representations would be, and the stronger pseudoneglect.…”

Section: Implications For the Nature Of Pseudoneglectmentioning

confidence: 99%

“…For example, lateral attentional biases have been found to differ as a function of viewing distance. Studies using both the line bisection task (i.e., marking the Varnava, McCarthy, & Beaumont, 2002). This shift in bias is generally continuous, and the rate at which it occurs has been taken as an index of the extent, or "size," of near space.…”

Section: Introductionmentioning

confidence: 99%

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Right hemisphere control of visuospatial attention in near space

et al. 2015

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Section: Behavioural Datasupporting

confidence: 89%

Section: Differences Between Landmark and Bisection Tasksmentioning

confidence: 50%

Section: Regression Analysesmentioning

confidence: 95%

Section: Implications For the Nature Of Pseudoneglectmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Right hemisphere control of visuospatial attention in near space

et al. 2015

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Space perception and body morphology: extent of near space scales with arm length

2007

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Numerous studies have found that the near space immediately surrounding the body is represented differently than more distant space. In a previous study, we found a gradual shift in attentional bias (on a line bisection task) between near and far space (Longo and Lourenco in Neuropsychologia 44:977-981, 2006). The present study concerns the possibility that arm length relates systematically to the rate at which this gradual shift between near and far space occurs. Participants bisected lines using a laser pointer at eight distances (within and beyond arm's reach), and the rate of shift was estimated by the slope of the least-squares regression line. A negative correlation was found between the slopes and arm length; participants with longer arms showed a more gradual shift in bias with increasing distance than those with shorter arms. These results suggest that, while near space cannot be considered categorically as that within arm's reach, there is a systematic relation between the extent ("size") of near space and arm length. Arm length may constitute an intrinsic metric for the representation of near space.

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Action ability modulates time-to-collision judgments

et al. 2017

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Time-to-collision (TTC) underestimation has been interpreted as an adaptive response that allows observers to have more time to engage in a defensive behaviour. This bias seems, therefore, strongly linked to action preparation. There is evidence that the observer’s physical fitness modulates the underestimation effect so that people who need more time to react (i.e. those with less physical fitness) show a stronger underestimation effect. Here we investigated whether this bias is influenced by the momentary action capability of the observers. In the first experiment, participants estimated the time-to-collision of threatening or non-threatening stimuli while being mildly immobilized (with a chin rest) or while standing freely. Having reduced the possibility of movement led participants to show more underestimation of the approaching stimuli. However, this effect was not stronger for threatening relative to non-threatening stimuli. The effect of the action capability found in the first experiment could be interpreted as an expansion of peripersonal space (PPS). In the second experiment, we thus investigated the generality of this effect using an established paradigm to measure the size of peripersonal space. Participants bisected lines from different distances while in the chin rest or standing freely. The results replicated the classic left-to-right gradient in lateral spatial attention with increasing viewing distance, but no effect of immobilization was found. The manipulation of the momentary action capability of the observers influenced the participants’ performance in the TTC task but not in the line bisection task. These results are discussed in relation to the different functions of PPS.

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Line bisection in normal adults: direction of attentional bias for near and far space

Cited by 72 publications

References 47 publications

Right hemisphere control of visuospatial attention in near space

Right hemisphere control of visuospatial attention in near space

Space perception and body morphology: extent of near space scales with arm length

Action ability modulates time-to-collision judgments

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