scholarly journals The effects of letter matrix and inter stimulus interval on P300 Event Related Potential

2020 ◽  
Vol 3 (SI3) ◽  
pp. First
Author(s):  
Minh Huong Nguyen Thi ◽  
Phuong Quynh Vu Nguyen
Keyword(s):  
Event Related Potential ◽  
Viet Nam ◽  
Stimulus Interval ◽  
Appearance Time ◽  
Matrix Size ◽  
Inter Stimulus Interval ◽  
Individual System ◽  
The Disabled ◽  
The Impact ◽  
Bci System

According to the General Statistics Office (Ministry of Planning and investment) collaborated with the United Nations Children’s Fund in Viet Nam, from 2016 to 2017, there were nearly 5 million households which had disabilities in the country. The proportion of people with disabilities who were over 2 years old accounted for 7% of the population. Another statistic is based on the Christopher & Dana Reeve Foundation report in 2013, about 5.4 million Americans suffer from disability [2]. Many research works, therefore, have been built with the aim of improving the ability of movement and communication, based on biomedical signals, especially the Brain-Computer Interface (BCI) system. BCI is a technology that enables the use of the brain’s neural activity to communicate with others or to control machines, artificial limbs, or robots without direct physical movements. BCI based on electroencephalogram (EEG) can be applied to the disabled individual system. In recent years, there are many people suffering from the loss of all voluntary muscle control in Viet Nam. Therefore, they really need alternative interaction methods to control their behaviors with external environment. Thanks to the development of Brain-Computer interfaces and the EEG headset have been helping people who are incapable of any motion for function can communicate with the external world, due to the P300 signal. As the important consideration to discover which factors affect the accuracy of BCI system to improve communication quality for the ability of disabled people, we decide to discover the impact of character matrix size and inter stimulus interval on event related potential. The duration of the inter stimulus interval (ISI) between targets is set at 187,5 ms and 125 ms for two different matrix sizes 3x3 and 6x6. The results provide that the largest amplitudes of P300 waveforms occur remarkably at the occipital and frontal channels and are higher than in 6x6 letter matrix compared with 3x3 matrix. The different matrix size and ISI does not affect on the appearance time of the P300 signal, and it is in the range 235-244 ms after stimulation. These good results promise to help other researches to build a perfect experimental procedure in real assistance application for using BCI – P300 systems.

Effects of inter-stimulus interval (ISI) duration on the N1 and P2 components of the auditory event-related potential

2014 ◽  
Vol 94 (3) ◽  
pp. 311-318 ◽  
Author(s):  
Diana R. Pereira ◽  
Susana Cardoso ◽  
Fernando Ferreira-Santos ◽  
Carina Fernandes ◽  
Cassilda Cunha-Reis ◽  
...  
Keyword(s):  
Event Related Potential ◽  
Stimulus Interval ◽  
Auditory Event ◽  
Inter Stimulus Interval

Examining the Impact of the Disabled Youth Peer Development Initiative: What are the Long-Term Outcomes?

2003 ◽  
Author(s):  
Teresa Garate-Serafini ◽  
Jose Mendez ◽  
Patty Arriaga ◽  
Larry Labiak ◽  
Carol Reynolds
Keyword(s):  
Long Term Outcomes ◽  
The Disabled ◽  
The Impact

scholarly journals The MindGomoku: An Online P300 BCI Game Based on Bayesian Deep Learning

Sensors ◽  
2021 ◽  
Vol 21 (5) ◽  
pp. 1613
Author(s):  
Man Li ◽  
Feng Li ◽  
Jiahui Pan ◽  
Dengyong Zhang ◽  
Suna Zhao ◽  
...  
Keyword(s):  
Brain Computer Interface ◽  
Computer Interface ◽  
System Control ◽  
Average Accuracy ◽  
Training Samples ◽  
The Disabled ◽  
Limited Training Samples ◽  
The Stability ◽  
Electroencephalogram Eeg ◽  
Bci System

In addition to helping develop products that aid the disabled, brain–computer interface (BCI) technology can also become a modality of entertainment for all people. However, most BCI games cannot be widely promoted due to the poor control performance or because they easily cause fatigue. In this paper, we propose a P300 brain–computer-interface game (MindGomoku) to explore a feasible and natural way to play games by using electroencephalogram (EEG) signals in a practical environment. The novelty of this research is reflected in integrating the characteristics of game rules and the BCI system when designing BCI games and paradigms. Moreover, a simplified Bayesian convolutional neural network (SBCNN) algorithm is introduced to achieve high accuracy on limited training samples. To prove the reliability of the proposed algorithm and system control, 10 subjects were selected to participate in two online control experiments. The experimental results showed that all subjects successfully completed the game control with an average accuracy of 90.7% and played the MindGomoku an average of more than 11 min. These findings fully demonstrate the stability and effectiveness of the proposed system. This BCI system not only provides a form of entertainment for users, particularly the disabled, but also provides more possibilities for games.

scholarly journals Effect of Distracting Background Speech in an Auditory Brain–Computer Interface

2021 ◽  
Vol 11 (1) ◽  
pp. 39
Author(s):  
Álvaro Fernández-Rodríguez ◽  
Ricardo Ron-Angevin ◽  
Ernesto J. Sanz-Arigita ◽  
Antoine Parize ◽  
Juliette Esquirol ◽  
...  
Keyword(s):  
Brain Computer Interface ◽  
Event Related Potential ◽  
Computer Interface ◽  
Cognitive Workload ◽  
Auditory Event ◽  
Shared Attention ◽  
Attentional Condition ◽  
Different Types ◽  
The Impact ◽  
Auditory Bci

Studies so far have analyzed the effect of distractor stimuli in different types of brain–computer interface (BCI). However, the effect of a background speech has not been studied using an auditory event-related potential (ERP-BCI), a convenient option when the visual path cannot be adopted by users. Thus, the aim of the present work is to examine the impact of a background speech on selection performance and user workload in auditory BCI systems. Eleven participants tested three conditions: (i) auditory BCI control condition, (ii) auditory BCI with a background speech to ignore (non-attentional condition), and (iii) auditory BCI while the user has to pay attention to the background speech (attentional condition). The results demonstrated that, despite no significant differences in performance, shared attention to auditory BCI and background speech required a higher cognitive workload. In addition, the P300 target stimuli in the non-attentional condition were significantly higher than those in the attentional condition for several channels. The non-attentional condition was the only condition that showed significant differences in the amplitude of the P300 between target and non-target stimuli. The present study indicates that background speech, especially when it is attended to, is an important interference that should be avoided while using an auditory BCI.

Who Cares for the Family?

1978 ◽  
Vol 7 (3) ◽  
pp. 257-284 ◽  
Author(s):  
Hilary Land
Keyword(s):  
Labour Market ◽  
Domestic Workers ◽  
Careful Examination ◽  
Family Policies ◽  
Adult Men ◽  
The Family ◽  
The Disabled ◽  
Unpaid Labour ◽  
Maintenance Systems ◽  
The Impact

ABSTRACTAlthough Britain has never had a set of policies explicitly labelled ‘family policies’, most if not all social policies are implicitly family policies because they are based on certain assumptions about the nature of relationships between the sexes and the generations. By careful examination of the detail of the legislation and administrative rules, together with the way in which services are allocated and used, it is possible to expose these assumptions and show that they are not only consistent between policies but very persistent over time. This paper first examines the assumptions concerning the division of unpaid labour within the family whereby women care for the young, the sick and the old and for able-bodied adult men (their husbands). The examples are selected from a variety of income maintenance systems and services for children, the old and the disabled. Particular attention is focused on the extent to which it is recognized that women are at the same time workers in the labour market and unpaid domestic workers in the home. The second part of the paper analyses the impact on their participation and opportunities in the labour market of the ideology which accords to women the primary responsibilities for caring for other members of their family. The perpetuation of such an ideology favours the interests of men and frequently the interests of the economically powerful, but it is not assumed that these interests always coincide.

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