Attending to a location in three-dimensional space modulates early ERPs

Kasai, Tetsuko; Morotomi, Takashi; Katayama, Jun’ichi; Kumada, Takatsune

doi:10.1016/s0926-6410(03)00115-0

Cited by 31 publications

(23 citation statements)

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“…However, previous studies have also shown that N1 is associated with object-based attention in the case of overlapped surfaces at the same spatial location (Khoe, Mitchell, Reynolds, & Hillyard, 2005;Pinilla, Cobo, Torres, & Valdes-Sosa, 2001;Valdes-Sosa, Bobes, Rodriguez, & Pinilla, 1998). Therefore, the early object-based effect of ERP occurs in both spatial and nonspatial cases, at least two-dimensionally, suggesting that it reflects processing at an intermediate stage from two-dimensional (2-D) retinal inputs to space-invariant or 3-D representations, consistent with the ERP attention effects in 3-D space (Kasai, Morotomi, Katayama, & Kumada, 2003). On the other hand, N2pc might be associated with other spatial components in object-based attention.…”

Section: The Nature Of Object Representations For Attentionsupporting

confidence: 62%

Attention-spreading Based on Hierarchical Spatial Representations for Connected Objects

Kasai

2010

Journal of Cognitive Neuroscience

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Abstract& Attention selects objects or groups as the most fundamental unit, and this may be achieved through a process in which attention automatically spreads throughout their entire region. Previously, we found that a lateralized potential relative to an attended hemifield at occipito-temporal electrode sites reflects attentionspreading in response to connected bilateral stimuli [Kasai, T., & Kondo, M. Electrophysiological correlates of attention-spreading in visual grouping. NeuroReport, 18, 93-98, 2007]. The present study examined the nature of object representations by manipulating the extent of grouping through connectedness, while controlling the symmetrical structure of bilateral stimuli. The electrophysiological results of two experiments consistently indicated that attention was guided twice in association with perceptual grouping in the early phase (N1, 150-200 msec poststimulus) and with the unity of an object in the later phase (N2pc, 310/330-390 msec). This suggests that there are two processes in objectbased spatial selection, and these are discussed with regard to their cognitive mechanisms and object representations. &

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Section: The Nature Of Object Representations For Attentionsupporting

confidence: 62%

Attention-spreading Based on Hierarchical Spatial Representations for Connected Objects

Kasai

2010

Journal of Cognitive Neuroscience

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“…N1 modulation has also been found for object-based selection with overlapped surfaces generated by moving dots (Khoe et al, 2005;Pinilla et al, 2001;Valdes-Sosa et al, 1998) and for attention in three-dimensional space (Kasai et al, 2003).…”

Section: A Common Mechanism In Object-based Attentionmentioning

confidence: 85%

Are objects the same as groups? ERP correlates of spatial attentional guidance by irrelevant feature similarity

Kasai¹,

Moriya²,

Hirano³

2011

Brain Research

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It has been proposed that the most fundamental units of attentional selection are "objects" that are grouped according to Gestalt factors such as similarity or connectedness.Previous studies using event-related potentials (ERPs) have shown that object-based attention is associated with modulations of the visual-evoked N1 component, which reflects an early cortical mechanism that is shared with spatial attention. However, these studies only examined the case of perceptually continuous objects. The present study examined the case of separate objects that are grouped according to feature similarity (color, shape), by indexing lateralized potentials at posterior sites in a sustained-attention task that involved bilateral stimulus arrays. A behavioral object effect was found only for task-relevant shape similarity. Electrophysiological results indicated that attention was guided to the task-irrelevant side of the visual field due to achromatic-color similarity in N1 (155-205 ms post-stimulus) and early N2 (210-260 ms) and due to shape similarity in early N2 and late N2 (280-400 ms) latency ranges. These results are discussed in terms of selection mechanisms and object/group representations.

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“…One example of this distinction has been reported for visual spatial processing; early visual perception sometimes reflects coarse spatial selection, such that all images presented in the same quadrant as a cued location elicit a larger visual P1, whereas only images presented very near cued locations elicit a larger amplitude N2 (Bush, Sanders, & Cave, 2007;Eimer, 1999;Kasai, Morotomi, Katayama, & Kumada, 2003;Shedden & Nordgaard, 2001). Previous studies of temporally selective attention that have reported effects on early perceptual processing Griffin et al, 2002, Experiment 1;Lange & Röder, 2006;Lange et al, 2003) have not distinguished between extremely coarse selection (anything presented before a temporal boundary, rather than anything presented after) and precise temporal selection.…”

Section: Discussionmentioning

confidence: 96%

Temporally selective attention modulates early perceptual processing: Event-related potential evidence

Sanders

Astheimer

2008

Perception & Psychophysics

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Attending to a location in three-dimensional space modulates early ERPs

Cited by 31 publications

References 50 publications

Attention-spreading Based on Hierarchical Spatial Representations for Connected Objects

Attention-spreading Based on Hierarchical Spatial Representations for Connected Objects

Are objects the same as groups? ERP correlates of spatial attentional guidance by irrelevant feature similarity

Temporally selective attention modulates early perceptual processing: Event-related potential evidence

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