Effects of training and motivation on auditory P300 brain–computer interface performance

Baykara, Ebru; Ruf, Carolin A.; C, Fioravanti; Käthner, Ivo; Simon, Nadine; Kleih, Sonja C.; Kübler, Andrea; Halder, Sebastian

doi:10.1016/j.clinph.2015.04.054

Cited by 80 publications

(100 citation statements)

References 48 publications

(73 reference statements)

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“…Motivation is important because it can affect P300 BCI performance (Nijboer et al, 2008bKleih et al, 2010;Baykara et al, 2016), and because the question of whether ALS patients and related patients would be motivated to use a BCI has been controversial (Nijboer et al, 2013). Our results relating to motivation and satisfaction support the general consensus that ALS patients might indeed want to use P300 BCIs, even given their current limitations (Zickler et al, 2009;Huggins et al, 2011;Blain et al, 2012).…”

Section: Discussionsupporting

confidence: 69%

Reaching and grasping a glass of water by locked-in ALS patients through a BCI-controlled humanoid robot

Spataro¹,

Sorbello²,

Tramonte³

et al. 2015

Journal of the Neurological Sciences

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Locked-in Amyotrophic Lateral Sclerosis (ALS) patients are fully dependent on caregivers for any daily need. At this stage, basic communication and environmental control may not be possible even with commonly used augmentative and alternative communication devices. Brain Computer Interface (BCI) technology allows users to modulate brain activity for communication and control of machines and devices, without requiring a motor control. In the last several years, numerous articles have described how persons with ALS could effectively use BCIs for different goals, usually spelling. In the present study, locked-in ALS patients used a BCI system to directly control the humanoid robot NAO (Aldebaran Robotics, France) with the aim of reaching and grasping a glass of water. Four ALS patients and four healthy controls were recruited and trained to operate this humanoid robot through a P300-based BCI. A few minutes training was sufficient to efficiently operate the system in different environments. Three out of the four ALS patients and all controls successfully performed the task with a high level of accuracy. These results suggest that BCI-operated robots can be used by locked-in ALS patients as an artificial alter-ego, the machine being able to move, speak and act in his/her place.

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Section: Discussionsupporting

confidence: 69%

Reaching and grasping a glass of water by locked-in ALS patients through a BCI-controlled humanoid robot

Spataro¹,

Sorbello²,

Tramonte³

et al. 2015

Journal of the Neurological Sciences

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“…As a consequence, in ALS patients as well as in other behaviorally non-responsive patients, the auditory channel is usually better preserved [55] or might even be the only remaining channel to establish communication [56]. Application of auditory BCIs of different kinds have shown promising results in healthy participants [9, 15, 57–59] and auditory P300 BCIs based on the tone segregation phenomenon [60] or animal sounds were also brought to patients [59]. …”

Section: Discussionmentioning

confidence: 99%

Circadian course of the P300 ERP in patients with amyotrophic lateral sclerosis - implications for brain-computer interfaces (BCI)

et al. 2017

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BackgroundAccidents or neurodegenerative diseases like amyotrophic lateral sclerosis (ALS) can lead to progressing, extensive, and complete paralysis leaving patients aware but unable to communicate (locked-in state). Brain-computer interfaces (BCI) based on electroencephalography represent an important approach to establish communication with these patients. The most common BCI for communication rely on the P300, a positive deflection arising in response to rare events. To foster broader application of BCIs for restoring lost function, also for end-users with impaired vision, we explored whether there were specific time windows during the day in which a P300 driven BCI should be preferably applied.MethodsThe present study investigated the influence of time of the day and modality (visual vs. auditory) on P300 amplitude and latency. A sample of 14 patients (end-users) with ALS and 14 healthy age matched volunteers participated in the study and P300 event-related potentials (ERP) were recorded at four different times (10, 12 am, 2, & 4 pm) during the day.ResultsResults indicated no differences in P300 amplitudes or latencies between groups (ALS patients v. healthy participants) or time of measurement. In the auditory condition, latencies were shorter and amplitudes smaller as compared to the visual condition.ConclusionOur findings suggest applicability of EEG/BCI sessions in patients with ALS throughout normal waking hours. Future studies using actual BCI systems are needed to generalize these findings with regard to BCI effectiveness/efficiency and other times of day.

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“…It is therefore still unknown whether this results generalize to end-users. Moreover, performances are still better when exploiting subject-specific data and user training, even for P300-based BCI [79, 80]. …”

Section: Signal Processing and Decodingmentioning

confidence: 99%

Heading for new shores! Overcoming pitfalls in BCI design

Chavarriaga

Fried-Oken²,

Kleih

et al. 2016

Brain-Computer Interfaces

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Research in brain-computer interfaces has achieved impressive progress towards implementing assistive technologies for restoration or substitution of lost motor capabilities, as well as supporting technologies for able-bodied subjects. Notwithstanding this progress, effective translation of these interfaces from proof-of concept prototypes into reliable applications remains elusive. As a matter of fact, most of the current BCI systems cannot be used independently for long periods of time by their intended end-users. Multiple factors that impair achieving this goal have already been identified. However, it is not clear how do they affect the overall BCI performance or how they should be tackled. This is worsened by the publication bias where only positive results are disseminated, preventing the research community from learning from its errors. This paper is the result of a workshop held at the 6th International BCI meeting in Asilomar. We summarize here the discussion on concrete research avenues and guidelines that may help overcoming common pitfalls and make BCIs become a useful alternative communication device.

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Effects of training and motivation on auditory P300 brain–computer interface performance

Abstract: The described auditory BCI system may help end-users to communicate independently of gaze control with their environment.

Cited by 80 publications

References 48 publications

Reaching and grasping a glass of water by locked-in ALS patients through a BCI-controlled humanoid robot

Reaching and grasping a glass of water by locked-in ALS patients through a BCI-controlled humanoid robot

Circadian course of the P300 ERP in patients with amyotrophic lateral sclerosis - implications for brain-computer interfaces (BCI)

Heading for new shores! Overcoming pitfalls in BCI design

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