The P300 as a Typing Tool: Tests of Brain Computer Interface With an ALS Patient.

Eric Sellers; G. Schalk; E. Donchin

The P300 as a Typing Tool: Tests of Brain Computer Interface With an ALS Patient.

Eric Sellers, G. Schalk, E. Donchin

Research output: Contribution to conference › Presentation

Abstract

   The Display 
 • Matrix of 6 by 6 characters
 • Every 125ms a row or a column are intensified (“flashed”) for 100ms
 • The 6 rows and 6 columns are flashed at random
 • Subject focuses attention on one cell (P)
 
   The Concept 
 • The flashes constitute an oddball sequence
 • The row and the column containing the target character are the “rare category” and should elicit a P300
 • Thus by detecting which row and column elicited a P300 the program can identify the  “typed” letter.
 
   Previous Results 
 • Donchin et al. (2000) tested the system with wheelchair bound healthy adults and able-bodied adults
 • Note that the targets indeed elicited a P300
 • The challenge: reduce the number of  trials needed for detection
 • Off-line performance was approximately 80% at a rate of 8 characters per minute
 • On-line performance was 56% with column or row correct 92% of the time

Original language	American English
State	Published - Oct 2003
Event	43rd annual meeting of the Society for Psychophysiological Research - Chicago, IL Duration: Oct 1 2003 → …

Conference

Conference	43rd annual meeting of the Society for Psychophysiological Research
Period	10/1/03 → …

Keywords

ALS
BCI
P300
typing tool

Disciplines

Cognitive Psychology

Cite this

@conference{784d9d7aa6df48f88aed9d48ddb9e115,

title = "The P300 as a Typing Tool: Tests of Brain Computer Interface With an ALS Patient.",

abstract = " The Display • Matrix of 6 by 6 characters • Every 125ms a row or a column are intensified (“flashed”) for 100ms • The 6 rows and 6 columns are flashed at random • Subject focuses attention on one cell (P) The Concept • The flashes constitute an oddball sequence • The row and the column containing the target character are the “rare category” and should elicit a P300 • Thus by detecting which row and column elicited a P300 the program can identify the “typed” letter. Previous Results • Donchin et al. (2000) tested the system with wheelchair bound healthy adults and able-bodied adults • Note that the targets indeed elicited a P300 • The challenge: reduce the number of trials needed for detection • Off-line performance was approximately 80\% at a rate of 8 characters per minute • On-line performance was 56\% with column or row correct 92\% of the time",

keywords = "ALS, BCI, P300, typing tool",

author = "Eric Sellers and G. Schalk and E. Donchin",

year = "2003",

month = oct,

language = "American English",

note = "43rd annual meeting of the Society for Psychophysiological Research ; Conference date: 01-10-2003",

}

TY - CONF

T1 - The P300 as a Typing Tool: Tests of Brain Computer Interface With an ALS Patient.

AU - Sellers, Eric

AU - Schalk, G.

AU - Donchin, E.

PY - 2003/10

Y1 - 2003/10

N2 - The Display • Matrix of 6 by 6 characters • Every 125ms a row or a column are intensified (“flashed”) for 100ms • The 6 rows and 6 columns are flashed at random • Subject focuses attention on one cell (P) The Concept • The flashes constitute an oddball sequence • The row and the column containing the target character are the “rare category” and should elicit a P300 • Thus by detecting which row and column elicited a P300 the program can identify the “typed” letter. Previous Results • Donchin et al. (2000) tested the system with wheelchair bound healthy adults and able-bodied adults • Note that the targets indeed elicited a P300 • The challenge: reduce the number of trials needed for detection • Off-line performance was approximately 80% at a rate of 8 characters per minute • On-line performance was 56% with column or row correct 92% of the time

AB - The Display • Matrix of 6 by 6 characters • Every 125ms a row or a column are intensified (“flashed”) for 100ms • The 6 rows and 6 columns are flashed at random • Subject focuses attention on one cell (P) The Concept • The flashes constitute an oddball sequence • The row and the column containing the target character are the “rare category” and should elicit a P300 • Thus by detecting which row and column elicited a P300 the program can identify the “typed” letter. Previous Results • Donchin et al. (2000) tested the system with wheelchair bound healthy adults and able-bodied adults • Note that the targets indeed elicited a P300 • The challenge: reduce the number of trials needed for detection • Off-line performance was approximately 80% at a rate of 8 characters per minute • On-line performance was 56% with column or row correct 92% of the time

KW - ALS

KW - BCI

KW - P300

KW - typing tool

UR - https://www.etsu.edu/cas/psychology/bcilab/documents/sellers_spr_pstr03.pdf

M3 - Presentation

T2 - 43rd annual meeting of the Society for Psychophysiological Research

Y2 - 1 October 2003

ER -

The P300 as a Typing Tool: Tests of Brain Computer Interface With an ALS Patient.

Abstract

Conference

Keywords

Disciplines

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Cite this