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Articles 1 - 17 of 17

Full-Text Articles in Social and Behavioral Sciences

Sequential Processing In Young And Older Adults In The Equiprobable Auditory Go/Nogo Task, Robert J. Barry, Frances De Blasio, Adele E. Cave Jan 2016

Sequential Processing In Young And Older Adults In The Equiprobable Auditory Go/Nogo Task, Robert J. Barry, Frances De Blasio, Adele E. Cave

Faculty of Social Sciences - Papers (Archive)

Objective: We recently proposed a sequential processing schema for the equiprobable auditory Go/NoGo task, based on a principal components analysis (PCA) of event-related potentials (ERPs) from a university student sample. Here we sought to replicate the schema, and use it to explore processing in well-functioning older adults. Methods: We compared behavioural responding and ERPs of 20 independent-living older adults (Mage = 68.2 years) to data from a sex- and handedness-matched group of university students (Mage = 20.4 years). ERPs had substantial latency differences between the groups, and hence were subjected to separate group temporal PCAs. Results: Component ...


Caffeine Effects On Sequential Processing In The Equiprobable Go/Nogo Task, Robert Barry, Frances De Blasio, Adele E. Cave Jan 2014

Caffeine Effects On Sequential Processing In The Equiprobable Go/Nogo Task, Robert Barry, Frances De Blasio, Adele E. Cave

Faculty of Social Sciences - Papers (Archive)

Abstract presented at the 17th World Congress of Psychophysiology (IOP2014) of the International Organization of Psychophysiology (IOP) Hiroshima, Japan, September 23rd to 27th, 2014


Stimulus-To-Matching-Stimulus Interval Influences N1, P2, And P3b In An Equiprobable Go/Nogo Task, Genevieve Z. Steiner, Robert Barry, Craig J. Gonsalvez Jan 2014

Stimulus-To-Matching-Stimulus Interval Influences N1, P2, And P3b In An Equiprobable Go/Nogo Task, Genevieve Z. Steiner, Robert Barry, Craig J. Gonsalvez

Faculty of Social Sciences - Papers (Archive)

Previous research has shown that as the stimulus-to-matching-stimulus interval (including the target-to-target interval, TTI, and nontarget-to-nontarget interval, NNI) increases, the amplitude of the P300 ERP component increases systematically. Here, we extended previous P300 research and explored TTI and NNI effects on the various ERP components elicited in an auditory equiprobable Go/NoGo task. We also examined whether a similar mechanism was underpinning interval effects in early ERP components (e.g., N1). Thirty participants completed a specially-designed variable-ISI equiprobable task whilst their EEG activity was recorded. Component amplitudes were extracted using temporal PCA with unrestricted Varimax rotation. As expected, N1, P2 ...


Mapping The Effects Of Prestimulus Eeg Band Amplitude In An Equiprobable Go/Nogo Task, Frances De Blasio, Robert Barry Jan 2014

Mapping The Effects Of Prestimulus Eeg Band Amplitude In An Equiprobable Go/Nogo Task, Frances De Blasio, Robert Barry

Faculty of Social Sciences - Papers (Archive)

Abstract presented at the 17th World Congress of Psychophysiology (IOP2014) of the International Organization of Psychophysiology (IOP) Hiroshima, Japan, September 23rd to 27th, 2014


Erp Components And Performance In The Equiprobable Go/Nogo Task: Inhibition In Children, Robert Barry, Frances De Blasio Jan 2014

Erp Components And Performance In The Equiprobable Go/Nogo Task: Inhibition In Children, Robert Barry, Frances De Blasio

Faculty of Social Sciences - Papers (Archive)

Abstract presented at the 17th World Congress of Psychophysiology (IOP2014) of the International Organization of Psychophysiology (IOP) Hiroshima, Japan, September 23rd to 27th, 2014


Sequential Processing In The Equiprobable Auditory Go/Nogo Task: Children Vs. Adults, Robert Barry, Frances De Blasio, Jay P. Borchard Jan 2014

Sequential Processing In The Equiprobable Auditory Go/Nogo Task: Children Vs. Adults, Robert Barry, Frances De Blasio, Jay P. Borchard

Faculty of Social Sciences - Papers (Archive)

Objective To compare sequential processing in the unwarned auditory equiprobable Go/NoGo task in children and adults, in the context of a recently developed adult schema. Methods Adult and child samples completed an equiprobable auditory Go/NoGo task while EEG was recorded from 19 channels. Go and NoGo ERPs were decomposed using unrestricted Varimax-rotated PCAs for the groups separately, and in combination. The separate adult and child components were compared using the Congruence Coefficient. Brain sources of each assessed component were examined using eLORETA. Results Corresponding adult/child components were tentatively identified: two N1 subcomponents (N1-1, PN) and P2, followed ...


Preferred Eeg Brain States At Stimulus Onset In A Fixed Interstimulus Interval Equiprobable Auditory Go/Nogo Task: A Definitive Study, Robert Barry, Frances De Blasio, Vilfredo De Pascalis, Diana Karamacoska Jan 2014

Preferred Eeg Brain States At Stimulus Onset In A Fixed Interstimulus Interval Equiprobable Auditory Go/Nogo Task: A Definitive Study, Robert Barry, Frances De Blasio, Vilfredo De Pascalis, Diana Karamacoska

Faculty of Social Sciences - Papers (Archive)

This study examined the occurrence of preferred EEG phase states at stimulus onset in an equiprobable auditory Go/NoGo task with a fixed interstimulus interval, and their effects on the resultant event-related potentials (ERPs). We used a sliding short-time FFT decomposition of the EEG at Cz for each trial to assess prestimulus EEG activity in the delta, theta, alpha and beta bands. We determined the phase of each 2. Hz narrow-band contributing to these four broad bands at 125. ms before each stimulus onset, and for the first time, avoided contamination from poststimulus EEG activity. This phase value was extrapolated ...


Varying Task Difficulty In The Go/Nogo Task: The Effects Of Inhibitory Control, Arousal, And Perceived Effort On Erp Components, Nicholas Benikos, Stuart J. Johnstone, Steven J. Roodenrys Jan 2013

Varying Task Difficulty In The Go/Nogo Task: The Effects Of Inhibitory Control, Arousal, And Perceived Effort On Erp Components, Nicholas Benikos, Stuart J. Johnstone, Steven J. Roodenrys

Faculty of Social Sciences - Papers (Archive)

Similar to other executive functions, inhibitory control is thought to be a dynamic process that can be influenced by variations in task difficulty. However, little is known about how different task parameters alter inhibitory performance and processing as a task becomes more difficult. The aim of this study was to investigate the influence of varying task difficulty, via manipulation of reaction time deadline (RTD), on measures of inhibitory control, perceived effort, and task-related arousal (indexed by skin conductance level). Sixty adults completed a visual Go/Nogo task (70% Go) after being randomly assigned to one of three task difficulty conditions ...


Equiprobable Go/Nogo Auditory Erp Components: Adults Vs. Children, Robert Barry, Frances De Blasio, Jay P. Borchard Jan 2013

Equiprobable Go/Nogo Auditory Erp Components: Adults Vs. Children, Robert Barry, Frances De Blasio, Jay P. Borchard

Faculty of Social Sciences - Papers (Archive)

Abstract presented at the 23rd Australasian Society for Psychophysiology Conference, 20-22 Nov 2013, Wollongong, Australia


Prestimulus Delta And Theta Determinants Of Erp Responses In The Go/Nogo Task, Frances M. De Blasio, Robert J. Barry Jan 2013

Prestimulus Delta And Theta Determinants Of Erp Responses In The Go/Nogo Task, Frances M. De Blasio, Robert J. Barry

Faculty of Social Sciences - Papers (Archive)

Ongoing low-frequency EEG activity has long been associated with ERP components and their cognitive processing interpretations, yet few studies have directly investigated the prestimulus low-frequency EEG-ERP relationships, particularly within the auditory domain. The present study assessed the delta (1-3 Hz) and theta (4-7 Hz) bands individually, and their prestimulus influence on five subsequent components (P1, N1, P2, N2, and P3) within an equiprobable auditory Go/NoGo paradigm. At the nine central sites, accepted trials were sorted according to their ascending vertex prestimulus spectral band amplitude, and ERPs were derived from the upper and lower sorted thirds. The within-subjects analyses included ...


Short-Term Training In The Go/Nogo Task: Behavioural And Neural Changes Depend On Task Demands, Nicholas Benikos, Stuart J. Johnstone, Steven J. Roodenrys Jan 2013

Short-Term Training In The Go/Nogo Task: Behavioural And Neural Changes Depend On Task Demands, Nicholas Benikos, Stuart J. Johnstone, Steven J. Roodenrys

Faculty of Social Sciences - Papers (Archive)

Neural activity underlying executive functions is subject to modulation as a result of increasing cognitive demands and practice. In the present study, we examined these modulatory effects by varying task difficulty, as manipulated by reaction time deadline (RTD), on inhibitory control during a single Go/Nogo training session (8 blocks; 70% Go). Sixty adults were randomly assigned to one of three task difficulty conditions: High (n = 20), Medium (n = 20) and Low (n = 20), with RTDs of 300, 500 or 1000 ms, respectively. Task performance, Event-related potentials (ERPs) and task-related arousal (indexed by skin conductance level) were examined for training ...


Sequential Processing In The Equiprobable Auditory Go/Nogo Task: A Temporal Pca Study, Robert Barry, Frances De Blasio Jan 2013

Sequential Processing In The Equiprobable Auditory Go/Nogo Task: A Temporal Pca Study, Robert Barry, Frances De Blasio

Faculty of Social Sciences - Papers (Archive)

The unwarned auditory equiprobable Go/NoGo task provides a convenient means to assess differential processing, although our interpretations remain limited by the lack of research regarding the range of elicited components and their functional significance. We examined sequential processing in this paradigm, presenting 24 participants with a total of 300 trials in two blocks. EEG was recorded from 19 channels, and the Go and NoGo event-related potentials were decomposed using temporal Principal Components Analysis. Of the 218 unrestricted Varimax-rotated factors, seven were identifiable as components based on their latency, polarity, and topography: early N1, Processing Negativity (PN), and P2 components ...


Cnv Resolution Does Not Cause Nogo Anteriorisation Of The P3: A Failure To Replicate Simson Et Al., Janette Smith, Robert Barry, Genevieve Steiner Jan 2013

Cnv Resolution Does Not Cause Nogo Anteriorisation Of The P3: A Failure To Replicate Simson Et Al., Janette Smith, Robert Barry, Genevieve Steiner

Faculty of Social Sciences - Papers (Archive)

For 35 years, some researchers have argued that CNV resolution may affect or even produce the increased P3 for NoGo compared to Go trials, and thus that no 'inhibitory' NoGo P3 exists. This is based on the work of Simson et al. (1977b), the scalp topography of potentials in auditory and visual Go/NoGo tasks. Electroencephalography and Clinical Neurophysiology, 43, 864-875, which compared Go and NoGo topography after CNV was subtracted from NoGo trials only. Specifically, the NoGo P3 topography showed the distinctive frontocentral maximum, which is often linked to motor inhibition, when referenced to a pre-target baseline. This NoGo ...


Prestimulus Alpha And Beta Determinants Of Erp Responses In The Go/Nogo Task, Frances De Blasio, Robert Barry Jan 2013

Prestimulus Alpha And Beta Determinants Of Erp Responses In The Go/Nogo Task, Frances De Blasio, Robert Barry

Faculty of Social Sciences - Papers (Archive)

The nature of the relationships between the level of immediately-prestimulus EEG activity and auditory ERP components remains unclear. Particularly, both inverse and direct relationships have been reported for the alpha band. Here we aim to clarify the pattern of prestimulus EEG contributions in alpha (8-13 Hz), and investigate those in beta (14-24 Hz), for five ERP components (P1, N1, P2, N2, P3) in an auditory equiprobable Go/NoGo paradigm. Separate FFTs were applied to the prestimulus Cz data of each accepted trial. The alpha and beta bands were independently assessed. The mean prestimulus spectral band amplitude was computed and used ...


Expression Of Proteins Within The Nogo Receptor Complex Are Altered In The Dorsolateral Prefrontal Cortex In Schizophrenia, J Andrews, K Newell, F Fernandez Jan 2013

Expression Of Proteins Within The Nogo Receptor Complex Are Altered In The Dorsolateral Prefrontal Cortex In Schizophrenia, J Andrews, K Newell, F Fernandez

Faculty of Science, Medicine and Health - Papers: part A

No abstract provided.


Prestimulus Eeg-Erp Determinants In The Equiprobable Auditory Go/Nogo: Assessing The Influence Of Ten Levels Of Activity Using Pca, Frances De Blasio, Robert Barry Jan 2013

Prestimulus Eeg-Erp Determinants In The Equiprobable Auditory Go/Nogo: Assessing The Influence Of Ten Levels Of Activity Using Pca, Frances De Blasio, Robert Barry

Faculty of Social Sciences - Papers (Archive)

Abstract presented at the 23rd Australasian Society for Psychophysiology Conference, 20-22 Nov 2013, Wollongong, Australia


N1, P2, And P3b Are Affected By The Matching-Stimulus-Interval In An Auditory Equiprobable Go/Nogo Task, Genevieve Steiner, Robert Barry, Craig J. Gonsalvez Jan 2013

N1, P2, And P3b Are Affected By The Matching-Stimulus-Interval In An Auditory Equiprobable Go/Nogo Task, Genevieve Steiner, Robert Barry, Craig J. Gonsalvez

Faculty of Social Sciences - Papers (Archive)

Abstract presented at the 23rd Australasian Society for Psychophysiology Conference, 20-22 Nov 2013, Wollongong, Australia