Pupillary responses and attentional allocation problems on the backward masking task in schizophrenia

Granholm, Eric; Verney, Steven P.

doi:10.1016/j.ijpsycho.2003.12.004

Cited by 59 publications

(50 citation statements)

References 46 publications

(68 reference statements)

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“…Computing a PCA in the present study replicated the common factor structure with three temporal components (e.g., Granholm and Verney, 2004;Nuthmann and van der Meer, 2005). Similar to these studies, the experimental variation in the present study mainly affected a component around the time of the response.…”

Section: Discussionsupporting

confidence: 84%

Pupillary responses during lexical decisions vary with word frequency but not emotional valence

Kuchinke

Võ

Hofmann

et al. 2007

International Journal of Psychophysiology

171

169

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Section: Discussionsupporting

confidence: 84%

Pupillary responses during lexical decisions vary with word frequency but not emotional valence

Kuchinke

Võ

Hofmann

et al. 2007

International Journal of Psychophysiology

171

169

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“…To understand how abnormalities in early visual perception may be associated with other visual attention functions 35,36 and cognitive deficits, we examined the performance of participants on measures of sustained visual attention, visual search, and working and episodic memory. Table 2 presents means, SDs, and participant group comparisons for the attention and cognitive indices.…”

Section: Other Measures Of Visual Attention and Cognitionmentioning

confidence: 99%

Fragile Early Visual Percepts Mark Genetic Liability Specific to Schizophrenia

Sponheim

Sass

Noukki

et al. 2012

Schizophrenia Bulletin

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Disruption of visual percepts by a subsequent stimulus (ie, backward masking) has been consistently noted in schizophrenia, with some evidence that this fragility in early perception is present in people with genetic liability for the disorder. Given the potential of backward masking paradigms to mark neural processes that confer risk for schizophrenia, it is important to test the diagnostic specificity of abnormalities in visual perception. To more fully assess whether masking visual stimuli reveals a marker of genetic liability (ie, endophenotype) specific to schizophrenia, we tested 44 people with the disorder, 29 people with bipolar disorder, 56 first-degree biological relatives of people with schizophrenia, 26 first-degree biological relatives of people with bipolar disorder, and 43 nonpsychiatric control participants using a magnocellular-biased visual backward masking procedure that included target-to-mask onset asynchronies ranging from 0 to 80 ms. Relatives of people with schizophrenia who were without schizophrenia spectrum disorders exhibited impaired performance compared with nonpsychiatric control participants and relatives of people with bipolar disorder when a visual mask interrupted early perception (eg, 27 ms). A similar vulnerability of early processes was noted in people with schizophrenia, yet they also had impaired performance when masks occurred at later time points (ie, 80 ms). Performance deficits were not attributable to intellectual function, measures of attention and memory, symptomatology, or medication dosage. Bipolar patients and their relatives failed to exhibit deficits on the backward masking task. Fragility of early visual percepts appears to mark genetic liability specific to schizophrenia and may serve as an endophenotype for the disorder.

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“…A PCA was used to analyze the pupillary response waveform based on the findings from our previous studies (Granholm and Verney, 2004;Verney, 2001). Analysis of variance (ANOVA) was used to analyze the within subjects conditions for detection accuracy and pupillary responses on the visual backward masking task.…”

Section: Data Reductionmentioning

confidence: 99%

“…In an attempt to isolate the separate processing demands associated with specific task stimuli (e.g. targets and masks), a principle components analysis (PCA) was computed on the Verney et al (2001) data set, as well as on pupillary response data sets from two additional backward masking task studies from our lab (Granholm and Verney, 2004;Verney, 2001). PCA is often used as a method of reducing the large number of data time points in psychophysiological data to a small number of meaningful factors.…”

Section: Introductionmentioning

confidence: 99%

Pupillary responses on the visual backward masking task reflect general cognitive ability

Verney

Granholm

Marshall

2004

International Journal of Psychophysiology

Self Cite

117

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Pupillary responses and attentional allocation problems on the backward masking task in schizophrenia

Cited by 59 publications

References 46 publications

Pupillary responses during lexical decisions vary with word frequency but not emotional valence

Pupillary responses during lexical decisions vary with word frequency but not emotional valence

Fragile Early Visual Percepts Mark Genetic Liability Specific to Schizophrenia

Pupillary responses on the visual backward masking task reflect general cognitive ability

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