Influence of task difficulty on the features of event-related potential during visual oddball task

2008 ◽  
Vol 445 (2) ◽  
pp. 179-183 ◽  
Author(s):  
Kyung Hwan Kim ◽  
Ja Hyun Kim ◽  
Jin Yoon ◽  
Ki-Young Jung
Keyword(s):  
Task Difficulty ◽  
Event Related Potential ◽  
Oddball Task ◽  
Visual Oddball

P300 Amplitude and Topography in an Autobiographical Oddball Paradigm Involving Simulated Amnesia

2002 ◽  
Vol 16 (1) ◽  
pp. 1-11 ◽  
Author(s):  
Antoinette R. Miller ◽  
J. Peter Rosenfeld ◽  
Matthew Soskins ◽  
Marianne Jhee
Keyword(s):  
Task Difficulty ◽  
Event Related Potential ◽  
P300 Amplitude ◽  
Oddball Paradigm ◽  
Amplitude Difference ◽  
P300 Component ◽  
Oddball Task

Abstract The P300 component of the event-related potential was recorded during two blocks of an autobiographical oddball task. All participants performed honestly during the first block (Phone), i.e., the oddball stimuli were phone numbers. During the second block (Birthday), in which the oddball stimuli were participants' birthdays, a Truth group (N = 13) performed honestly and a Malinger group (N = 14) simulated amnesia. Amnesia simulation significantly reduced P300 amplitudes, both between groups and within the Malinger group (Phone vs. Birthday), possibly because of an increase in task difficulty in the Malinger condition. Analysis of scaled amplitudes also indicated a trend for a feigning-related alteration in P300 topography. Bootstrapping of peak-to-peak amplitudes detected significantly more (93%) Malinger individuals than bootstrapping of baseline-to-peak amplitudes (64%). Bootstrapping also provided evidence of a feigning-related amplitude difference between oddball stimuli (i.e., Phone > Birthday) in 71% of Malinger group individuals. In this comparison, the peak-to-peak measure also performed significantly better in intraindividual diagnostics.

Changes in prefrontal cortex near infrared spectroscopy activity as a function of difficulty in a visual P300 paradigm

2018 ◽  
Vol 26 (4) ◽  
pp. 222-228 ◽  
Author(s):  
Will Rizer ◽  
Jacob S Aday ◽  
Joshua M Carlson
Keyword(s):  
Prefrontal Cortex ◽  
Task Difficulty ◽  
Near Infrared ◽  
Nir Spectroscopy ◽  
Event Related Potential ◽  
Attentional Resources ◽  
Oddball Task ◽  
The Right ◽  
Visual P300 ◽  
P300 Event Related Potential

The P300 event-related potential is an index of attentional resources related to target detection. Source localization and functional magnetic resonance imaging (fMRI) research has indicated that, among other regions, the prefrontal cortex contributes to the generation of the P300. Similar to fMRI, near infrared (NIR) spectroscopy measures change in blood oxygen levels, but offers several advantages including portability, low expense, and superior temporal resolution. No studies to date have examined the extent to which prefrontal cortex NIR spectroscopy measures are active during the P300 paradigm. To address this knowledge gap, participants completed a two-difficulty visual oddball task in which NIR spectroscopy and P300 data were collected in a counterbalanced order. Confirmatory results indicate that the P300 event-related potential is attenuated as a function of task difficulty. Similarly, NIR spectroscopy measures of oxygenated hemoglobin in the right medial prefrontal cortex are attenuated as a function of task difficulty. The results suggest that prefrontal cortex NIR spectroscopy measures are sensitive to task difficulty in a visual P300 oddball task.

Pre-attentive Visual Processing in Alzheimer’s Disease: An Event-related Potential Study

2021 ◽  
Vol 17 (13) ◽  
pp. 1195-1207
Author(s):  
Eunchan Na ◽  
Kanghee Lee ◽  
Eun J. Kim ◽  
Jong B. Bae ◽  
Seung W. Suh ◽  
...  
Keyword(s):  
Alzheimer’S Disease ◽  
Alzheimer's Disease ◽  
Visual Processing ◽  
Event Related Potential ◽  
Oddball Paradigm ◽  
Brain Functions ◽  
Oddball Task ◽  
Related Potentials ◽  
Processing Deficits ◽  
Visual Oddball

Introduction: While identifying Alzheimer’s Disease (AD) in its early stages is crucial, traditional neuropsychological tests tend to lack sensitivity and specificity for its diagnosis. Neuropsychological studies have reported visual processing deficits of AD, and event-related potentials (ERPs) are suitable to investigate pre-attentive processing with superior temporal resolution. Objective: This study aimed to investigate visual attentional characteristics of adults with AD, from pre-attentive to attentive processing, using a visual oddball task and ERPs. Methods: Cognitively normal elderly controls (CN) and patients with probable AD (AD) were recruited. Participants performed a three-stimulus visual oddball task and were asked to press a designated button in response to the target stimuli. The amplitudes of 4 ERPs were analyzed. Mismatchnegativity (vMMN) was analyzed around the parieto-occipital and temporo-occipital regions. P3a was analyzed around the fronto-central regions, whereas P3b was analyzed around the centro-parietal regions. Results: Late vMMN amplitudes of the AD group were significantly smaller than those of the CN group, while early vMMN amplitudes were comparable. Compared to the CN group, P3a amplitudes of the AD group were significantly smaller for the infrequent deviant stimuli, but the amplitudes for the standard stimuli were comparable. Lastly, the AD group had significantly smaller P3b amplitudes for the target stimuli compared to the CN group. Conclusion: Our findings imply that AD patients exhibit pre-attentive visual processing deficits, known to affect later higher-order brain functions. In a clinical setting, the visual oddball paradigm could be used to provide helpful diagnostic information since pre-attentive ERPs can be induced by passive exposure to infrequent stimuli.

scholarly journals Pre-attentive processing of Alzheimer's disease: an event-related potential study

2019 ◽  
Author(s):  
Eunchan Na ◽  
Kanghee Lee ◽  
Eun Ji Kim ◽  
Jong Bin Bae ◽  
Seung Wan Suh ◽  
...  
Keyword(s):  
Alzheimer’S Disease ◽  
Alzheimer's Disease ◽  
Visual Processing ◽  
Event Related Potentials ◽  
Event Related Potential ◽  
Oddball Paradigm ◽  
Brain Functions ◽  
Oddball Task ◽  
Related Potentials ◽  
Visual Oddball

Abstract Background: While identifying Alzheimer’s Disease (AD) in its early stages is crucial, traditional neuropsychological tests tend to lack sensitivity and specificity for its diagnosis. Based on the early visual attention deficits of adults with AD, which are apparent before cognitive deficits emerge, this study aimed to investigate visual attentional characteristics of adults with AD, from pre-attentive to attentive processing, using a visual oddball task and event-related potentials (ERPs).Methods: Cognitively normal elderly controls (NC, n=27) and patients with probable AD (AD, n=10) were recruited. Participants performed a three-stimulus visual oddball task and were asked to press a designated button in response to the target stimuli. The amplitudes of 4 ERPs were analyzed. Visual mismatch-negativity (vMMN) was analyzed around the parieto-occipital and temporo-occipital regions. P3a was analyzed around the fronto-central regions, whereas P3b was analyzed around the centro-parietal regions.Results: Late vMMN amplitudes of the AD group were significantly smaller than those of the NC group, while early vMMN amplitudes were comparable. Compared to the NC group, P3a amplitudes of the AD group were significantly smaller for the infrequent deviant stimuli but the amplitudes for the standard stimuli were comparable. Lastly, the AD group had significantly smaller P3b amplitudes than the NC group.Conclusion: Our findings imply that AD patients exhibit pre-attentive visual processing deficits, known to affect later higher-order brain functions. In a clinical setting, the visual oddball paradigm could be used to provide helpful diagnostic information since pre-attentive ERPs can be induced by passive exposure to infrequent stimuli.

Effective connectivity in target stimulus processing: A dynamic causal modeling study of visual oddball task

NeuroImage ◽  
2007 ◽  
Vol 35 (2) ◽  
pp. 827-835 ◽  
Author(s):  
Milan Brázdil ◽  
Michal Mikl ◽  
Radek Mareček ◽  
Petr Krupa ◽  
Ivan Rektor
Keyword(s):  
Target Stimulus ◽  
Effective Connectivity ◽  
Causal Modeling ◽  
Dynamic Causal Modeling ◽  
Stimulus Processing ◽  
Oddball Task ◽  
Visual Oddball ◽  
Modeling Study

scholarly journals Investigation on the neurophysiological correlates of similarity cognition of digital interface color and layout

2018 ◽  
Vol 10 (11) ◽  
pp. 168781401880320
Author(s):  
Ya-feng Niu ◽  
Yi Xie ◽  
Cheng-qi Xue ◽  
Hai-yan Wang ◽  
Wen-zhe Tang ◽  
...  
Keyword(s):  
Cognitive Processes ◽  
Cognitive Process ◽  
Event Related Potential ◽  
Average Amplitude ◽  
Color Code ◽  
Digital Interface ◽  
Empirical Significance ◽  
The Common ◽  
Enhance Efficiency ◽  
Visual Oddball

To investigate and compare the common features and differences of the cognitive processes, during which interfaces with diverse similarities are evaluated, this article chose the color code and layout forms of digital interface to carry out further research. The study adopted the visual Oddball experimental paradigm that was based on the event-related potential technique and integrated the behavioral and event-related potential data to analyze the neural features of the cognitive process when two coding forms were individually processed. The result reveals that there were P300 components, elicited by the target stimuli, in both of the two experiment sessions. The average amplitude of P300 positively correlates the similarities between the target and standard stimuli, with its latency positively correlating the overall complexity of the stimuli. In the color experiment session, there was apparent visual mismatching negativity around 200 ms after the present of the target, which is related with the early attention. The empirical significance of conclusions drawn in this study is listed as follows: first, it can help to effectively evaluate the usability of guiding features in the digital interfaces through the investigation on visual mismatching negativity elicited in the early attention process; second, the amplitude and latency of the P300 component can be applied in the evaluation and filtering of design schemes, which is based on the similarities perceived in the iterative process and this would enhance efficiency of user interface designers.

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