Hemispheric asymmetries for global and local processing as a function of stimulus exposure duration

Evert, Denise L.; Kmen, Meghan

doi:10.1016/s0278-2626(02)00528-6

Cited by 31 publications

(24 citation statements)

References 54 publications

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“…However, it is possible that the kinds of spatial frequency effects reported in the literature summarized above may only emerge under specific temporal conditions, as suggested by experimental data (Peyrin, Mermillod, Chokron, & Marendaz, 2006;Evert & Kmen, 2003;Peyrin, 2003;Blanca, Zalabardo, García-Criado, & Siles, 1994). These studies suggest that stimulus duration might be a key factor in the emergence of hemispheric asymmetries for different parts of the spatial frequency spectrum.…”

Section: Methodsmentioning

confidence: 94%

Differential Lateralization for Words and Faces: Category or Psychophysics?

Mercure

Dick

Halit

et al. 2008

Journal of Cognitive Neuroscience

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This set of three experiments assessed the influence of different psychophysical factors on the lateralization of the N170 event-related potential (ERP) component to words and faces. In all experiments, words elicited a left-lateralized N170, whereas faces elicited a right-lateralized or nonlateralized N170 depending on presentation conditions. Experiment 1 showed that lateralization for words (but not for faces) was influenced by spatial frequency. Experiment 2 showed that stimulus presentation time influenced N170 lateralization independently of spatial frequency composition. Finally, Experiment 3 showed that stimulus size and resolution did not influence N170 lateralization, but did influence N170 amplitude, albeit differentially for words and faces. These findings suggest that differential lateralization for words and faces, at least as measured by the N170, is influenced by spatial frequency (words), stimulus presentation time, and category.

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Section: Methodsmentioning

confidence: 94%

Differential Lateralization for Words and Faces: Category or Psychophysics?

Mercure

Dick

Halit

et al. 2008

Journal of Cognitive Neuroscience

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“…Although VF-effects for global/local processing have been reported in several experiments (Blanca, Zalabardo, Garcia-Criado, & Siles, 1994;Evert & Kmen, 2003;Hübner, 1997), taken together, reaction-time studies provide not much evidence in favor of hemispheric specialization. This conclusion can also be drawn from two meta-analyses showing that reaction-time studies with positive results were nearly balanced (Van Kleeck, 1989) or even outnumbered (Yovel, Yovel, & Levy, 2001) by those where no VF-effects were observed.…”

Section: Introductionmentioning

confidence: 87%

On the role of response conflicts and stimulus position for hemispheric differences in global/local processing: an ERP study

Volberg

Hübner

2004

Neuropsychologia

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It is widely assumed that the local and global levels of hierarchical stimuli are processed more efficiently in the left and right cerebral hemispheres, respectively. However, corresponding effects were not observed under all circumstances. In ERP studies, they occurred more often with centrally presented stimuli than with laterally presented ones, whereas reaction-time studies revealed that a response conflict between the levels is relevant. The present study examines which of these two factors is more important by presenting conflicting and non-conflicting stimuli to the left or right visual field and recording ERPs as well as collecting behavioral data. If a central stimulus position is crucial, then no effects should show up. Contrary to this prediction, the expected hemispheric differences were observed in the behavioral data as well as in the later occurring (N2 and P3) ERP amplitudes. However, in all variables, the effects were more pronounced for conflicting stimuli. The results suggest that response conflicts are more important for obtaining hemispheric differences in global/local processing than a central stimulus presentation. This is interpreted in the way that hemispheric differences vary with respect to the stimulus representation that is needed to select a proper response.

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“…Thus, an important endeavor is to determine the factors that reliably produce hemispheric asymmetries. In the search for such factors, various stimulus (e.g., Evert & Kmen, 2003) and task (e.g., Yovel et al, 2001) parameters have been manipulated with more or less success. However, with respect to the present objective, an interesting observation has already been made by Van Kleeck (1989) in his meta-analysis.…”

Section: Hemispheric Differencesmentioning

confidence: 99%

The Integration of Object Levels and Their Content: A Theory of Global/Local Processing and Related Hemispheric Differences.

Hübner¹,

Volberg²

2005

Journal of Experimental Psychology: Human Perception and Perfor

105

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This article presents and tests the authors' integration hypothesis of global/local processing, which proposes that at early stages of processing, the identities of global and local units of a hierarchical stimulus are represented separately from information about their respective levels and that, therefore, identity and level information have to be integrated at later stages. It further states that the cerebral hemispheres differ in their capacities for these binding processes. Three experiments are reported in which the integration hypothesis was tested. Participants had to identify a letter at a prespecified level with the viewing duration restricted by a mask. False reporting of the letter at the nontarget level was predicted to occur more often when the integration of identity and level could fail. This was the case. Moreover, visual-field effects occurred, as expected. Finally, a multinomial model was constructed and fitted to the data.

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Hemispheric asymmetries for global and local processing as a function of stimulus exposure duration

Cited by 31 publications

References 54 publications

Differential Lateralization for Words and Faces: Category or Psychophysics?

Differential Lateralization for Words and Faces: Category or Psychophysics?

On the role of response conflicts and stimulus position for hemispheric differences in global/local processing: an ERP study

The Integration of Object Levels and Their Content: A Theory of Global/Local Processing and Related Hemispheric Differences.

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