Perceptual asymmetries for free viewing of several types of chimeric stimuli

Luh, Karen E.; Rueckert, Linda; Levy, Jerre

doi:10.1016/0278-2626(91)90087-o

Cited by 145 publications

(135 citation statements)

References 35 publications

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“…However, the asymmetry was reduced for sketches and absent for nonface categories. This finding is consistent with neuropsychological (e.g., De Renzi, 1997), neuroimaging (e.g., McCarthy et al, 1997;De Renzi, Perani, Carlesimo, Silveri, & Fazio, 1994;Haxby et al, 1993), and behavioral studies (e.g., Luh, Rueckert, & Levy, 1991) indicating a right hemisphere advantage for face processing. Furthermore, it corroborates the hypothesis that some of the sketches were processed by a general rather than a face-specific visual processor or that, in general, the sketches were less efficient in initiating a face-specific process.…”

Section: Discussionsupporting

confidence: 84%

Structural Encoding of Human and Schematic Faces: Holistic and Part-Based Processes

Sagiv

Bentin

2001

Journal of Cognitive Neuroscience

369

275

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Abstract& The range of specificity and the response properties of the extrastriate face area were investigated by comparing the N170 event-related potential (ERP) component elicited by photographs of natural faces, realistically painted portraits, sketches of faces, schematic faces, and by nonface meaningful and meaningless visual stimuli. Results showed that the N170 distinguished between faces and nonface stimuli when the concept of a face was clearly rendered by the visual stimulus, but it did not distinguish among different face types: Even a schematic face made from simple line fragments triggered the N170. However, in a second experiment, inversion seemed to have a different effect on natural faces in which face components were available and on the pure gestalt-based schematic faces: The N170 amplitude was enhanced when natural faces were presented upside down but reduced when schematic faces were inverted. Inversion delayed the N170 peak latency for both natural and schematic faces. Together, these results suggest that early face processing in the human brain is subserved by a multiple-component neural system in which both whole-face configurations and face parts are processed. The relative involvement of the two perceptual processes is probably determined by whether the physiognomic value of the stimuli depends upon holistic configuration, or whether the individual components can be associated with faces even when presented outside the face context. &

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Section: Discussionsupporting

confidence: 84%

Structural Encoding of Human and Schematic Faces: Holistic and Part-Based Processes

Sagiv

Bentin

2001

Journal of Cognitive Neuroscience

369

275

View full text Add to dashboard Cite

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“…Using chimeric faces and a free-viewing administration, Levy, Heller, Banich and Burton (1983) showed that right-handed subjects judged faces as happier when the smile was on the left side of the face (with neutral on the right), when compared with the converse. Replications and extensions of these findings were reported in subsequent studies (Hoptman & Levy, 1988;Luh, Ruekert & Levy, 1991). Finally, using a similar paradigm in which chimeric faces showed an emotion on one side and a neutral expression on the other, Christman and Hackworth (1993) found greater accuracy in identifying the emotion when the emotion was on the left half of the chimera.…”

Section: Introductionsupporting

confidence: 57%

Laterality Biases to Chimeric Faces in Asperger Syndrome: What is Right About Face-Processing?

Ashwin

Wheelwright

Baron‐Cohen

2005

J Autism Dev Disord

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People show a left visual field (LVF) bias for faces, i.e., involving the right hemisphere of the brain. Lesion and neuroimaging studies confirm the importance of the right-hemisphere and suggest separable neural pathways for processing facial identity vs. emotions. We investigated the hemispheric processing of faces in adults with and without Asperger syndrome (AS) using facial emotion and identity chimeric tasks. Controls showed an LVF bias in both tasks, but no perceptual bias in a non-social control task. The AS group showed an LVF bias during both tasks, however the bias was reduced in the identity condition. Further, the AS group showed an LVF bias in the non-social condition. These results show a differential pattern of hemispheric processing of faces in AS.

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“…It is therefore possible that the lack of right hemisphere bias in melancholic depression is not related to emotional processing but rather to a deficit in visuospatial processing. To address these possibilities, researchers would do well in future studies to include a chimeric faces test in which the faces have a neutral expression and the task does not involve judgment of emotional content, for example, the gender chimeric faces test developed by Luh, Rueckert, and Levy (1991).…”

Section: Discussionmentioning

confidence: 99%

Atypical depression: Enhanced right hemispheric dominance for perceiving emotional chimeric faces.

Bruder¹,

Stewart²,

McGrath³

et al. 2002

Journal of Abnormal Psychology

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Two studies compared hemispatial bias for perceiving chimeric faces in patients having either atypical or typical depression and healthy controls. A total of 245 patients having major depressive disorder (MDD) or dysthymia (164 with atypical features) and 115 controls were tested on the Chimeric Faces Test. Atypical depression differed from typical depression and controls in showing abnormally large right hemisphere bias. This was present in patients having either MDD or dysthymia and was not related to anxiety, physical anhedonia, or vegetative symptoms. In contrast, patients having MDD with melancholia showed essentially no right hemisphere bias. This is further evidence that atypical depression is a biologically distinct subtype and underscores the importance of this diagnostic distinction for neurophysiologic studies.

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Perceptual asymmetries for free viewing of several types of chimeric stimuli

Cited by 145 publications

References 35 publications

Structural Encoding of Human and Schematic Faces: Holistic and Part-Based Processes

Structural Encoding of Human and Schematic Faces: Holistic and Part-Based Processes

Laterality Biases to Chimeric Faces in Asperger Syndrome: What is Right About Face-Processing?

Atypical depression: Enhanced right hemispheric dominance for perceiving emotional chimeric faces.

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