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WG3 COST B27 MK national report, Istanbul, September /20 Contingent Negative Variation (CNV) Experimental setup for the CNV experiments
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COST B27Working Group 3 MKnational report
Georgi Stojanov
Faculty of Electrical EngineeringUniversity of SS Cyril and Methodius in Skopje, Macedonia
WG3 COST B27 MK national report, Istanbul, September 3. 2005
TALK OUTLINE
PREVIOUS EXPERIENCE CNV and DCNV extraction and recognition EEG controlled devices
ONGOING RESEARCH representation of knowledge of the
environment in autonomous agents Behavior of human subjects in simple virtual
environments WG3 MK ROLE IN COST B27
WG3 COST B27 MK national report, Istanbul, September 3. 2005
Contingent Negative Variation (CNV)
s1 s2
reaction
record EEG
subject
Experimental setup for the CNV experiments
WG3 COST B27 MK national report, Istanbul, September 3. 2005
Contingent Negative Variation (CNV)
Typical CNV wave recorded from Cz electrode. By convention negative EEG values are up
WG3 COST B27 MK national report, Istanbul, September 3. 2005
CNV extraction using classical averaging
trials time
S1 S2
WG3 COST B27 MK national report, Istanbul, September 3. 2005
DYNAMIC CNV EXPERIMENTAL SETUP (DCNV)
subject
s1
reaction
record EEG
if i(cnv)>t and s2 then s2:=Fif i(cnv)<t and ~s2 then s2:=T
WG3 COST B27 MK national report, Istanbul, September 3. 2005
DYNAMIC CNV EXPERIMENTAL SETUP (DCNV)
WG3 COST B27 MK national report, Istanbul, September 3. 2005
EXTRACTION OF CNV WAVE DURING CLASSIC AND DCNV SETUP
( ) ( ) ( ) ( ) ( )
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( )( )n ps f
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( ) ( ) ( )( ) , ...n Hs f f fn
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( ) ( )( )ns h fii
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^ ^k k ks c s d f
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CNV DCNV
WG3 COST B27 MK national report, Istanbul, September 3. 2005
TALK OUTLINE
PREVIOUS EXPERIENCE CNV and DCNV extraction and recognition EEG controlled devices
ONGOING RESEARCH representation of knowledge of the
environment in autonomous agents Behavior of human subjects in simple virtual
environments WG3 MK ROLE IN COST B27
WG3 COST B27 MK national report, Istanbul, September 3. 2005
Behavior of human subjects in simple simulated environment
WG3 COST B27 MK national report, Istanbul, September 3. 2005
Behavior of human subjects in simple simulated environment
WG3 COST B27 MK national report, Istanbul, September 3. 2005
Behavior of human subjects in simple simulated environment
WG3 COST B27 MK national report, Istanbul, September 3. 2005
Behavior of human subjects in simple simulated environment
WG3 COST B27 MK national report, Istanbul, September 3. 2005
Behavior of human subjects in simple simulated environment
WG3 COST B27 MK national report, Istanbul, September 3. 2005
EXPERIMENTAL RESULTSVISUAL AND AUDITORY STIMULI
(8 subjects grand average)
y = -31,777x + 488,74 r2=0.84
0
200
400
600
1 2 3 4 5 6 7 8 9 10 11 12 13TIMES THE GOAL WAS REACHED
VISUAL STIMULI ONLY(8 subjects grand average)
y = -13,333x + 584,6 r2=0.68
0200400600800
1 2 3 4 5 6 7 8 9 10 11TIMES THE GOAL WAS REACHED
AUDITORY STIMULI ONLY (7 subjects grand average)
y = -23,97x + 426,44 r2=0.68
0
200
400
600
1 2 3 4 5 6 7 8 9 10 11 12 13 14TIMES THE GOAL WAS REACHED
learning was much faster for compound stimuli (slope= -31.8) than only auditory (slope= -23.0) or only visual (slope= -13.3) stimuli. The compound versus simple percept discrepancy was predicted by the model.
WG3 COST B27 MK national report, Istanbul, September 3. 2005
AUDITORY STIMULI ONLY
AUDITORY STIMULI ONLY (7 subjects grand average)
y = -23,97x + 426,44 r2=0.68
0
200
400
600
1 2 3 4 5 6 7 8 9 10 11 12 13 14TIMES THE GOAL WAS REACHED
WG3 COST B27 MK national report, Istanbul, September 3. 2005
EXPERIMENTAL RESULTSVISUAL AND AUDITORY STIMULI
(8 subjects grand average)
y = -31,777x + 488,74 r2=0.84
0
200
400
600
1 2 3 4 5 6 7 8 9 10 11 12 13TIMES THE GOAL WAS REACHED
VISUAL STIMULI ONLY(8 subjects grand average)
y = -13,333x + 584,6 r2=0.68
0200400600800
1 2 3 4 5 6 7 8 9 10 11TIMES THE GOAL WAS REACHED
AUDITORY STIMULI ONLY (7 subjects grand average)
y = -23,97x + 426,44 r2=0.68
0
200
400
600
1 2 3 4 5 6 7 8 9 10 11 12 13 14TIMES THE GOAL WAS REACHED
learning was much faster for compound stimuli (slope= -31.8) than only auditory (slope= -23.0) or only visual (slope= -13.3) stimuli. The compound versus simple percept discrepancy was predicted by the model.
WG3 COST B27 MK national report, Istanbul, September 3. 2005
VISUAL STIMULI ONLY
VISUAL STIMULI ONLY(8 subjects grand average)
y = -13,333x + 584,6 r2=0.68
0200400600800
1 2 3 4 5 6 7 8 9 10 11TIMES THE GOAL WAS REACHED
WG3 COST B27 MK national report, Istanbul, September 3. 2005
EXPERIMENTAL RESULTSVISUAL AND AUDITORY STIMULI
(8 subjects grand average)
y = -31,777x + 488,74 r2=0.84
0
200
400
600
1 2 3 4 5 6 7 8 9 10 11 12 13TIMES THE GOAL WAS REACHED
VISUAL STIMULI ONLY(8 subjects grand average)
y = -13,333x + 584,6 r2=0.68
0200400600800
1 2 3 4 5 6 7 8 9 10 11TIMES THE GOAL WAS REACHED
AUDITORY STIMULI ONLY (7 subjects grand average)
y = -23,97x + 426,44 r2=0.68
0
200
400
600
1 2 3 4 5 6 7 8 9 10 11 12 13 14TIMES THE GOAL WAS REACHED
learning was much faster for compound stimuli (slope= -31.8) than only auditory (slope= -23.0) or only visual (slope= -13.3) stimuli. The compound versus simple percept discrepancy was predicted by the model.
WG3 COST B27 MK national report, Istanbul, September 3. 2005
VISUAL AND AUDITORY STIMULI
VISUAL AND AUDITORY STIMULI(8 subjects grand average)
y = -31,777x + 488,74 r2=0.84
0
200
400
600
1 2 3 4 5 6 7 8 9 10 11 12 13TIMES THE GOAL WAS REACHED
WG3 COST B27 MK national report, Istanbul, September 3. 2005
TALK OUTLINE
PREVIOUS EXPERIENCE CNV and DCNV extraction and recognition EEG controlled devices
ONGOING RESEARCH representation of knowledge of the
environment in autonomous agents Behavior of human subjects in simple virtual
environments WG3 MK ROLE IN COST B27
WG3 COST B27 MK national report, Istanbul, September 3. 2005
EEG CONTROLED DEVICES
VISUAL FEEDBACK
RADIO CONTROL
WG3 COST B27 MK national report, Istanbul, September 3. 2005
SELECTED PUBLICATIONSStojanov, G., Bozinovski, S., Bozinovska, L., “AV Control System Which Makes Use of Environment Stabilizations”, SPIE Conference on Mobile Robot and Automated Vehicle Control, Boston, 1996.Stojanov, G., Bozinovska, L, Bozinovski, S., “Optimal Linear
Estimator for CNV Wave During the Dynamic CNV Paradigm Experiments”, 11th ISBE, Zagreb, 1996a.Bozinovska, L., Sestakov, M. Stojanov, G., Bozinovski, S.,
“Change in the CNV wave Intensity during bio-feedback Training with Personal Computer”, (in Serbo-Croatian),
Neurologija, Supl.2., 1988.Sestakov, M, “Digital Processing of Preparatory and Evoked Bio-
electric Sygnals” (in Macedonian), M.Sc. Thesis, ETF, University in Skopje, 1988Bozinovska, L., Bozinovski, S., Stojanov, G., “Electroexpectogram: Experimental Design and Algortithms”, IEEE Biomedical Days, Istambul, 1992.
WG3 COST B27 MK national report, Istanbul, September 3. 2005
TALK OUTLINE
PREVIOUS EXPERIENCE CNV and DCNV extraction and recognition EEG controlled devices
ONGOING RESEARCH representation of knowledge of the
environment in autonomous agents Behavior of human subjects in simple virtual
environments WG3 ROLE IN COST B27
WG3 COST B27 MK national report, Istanbul, September 3. 2005
WG3 ROLE IN COST B27
• participation in devising new experimental set-ups meant to invoke particular perceptual, memory/learning processes in human subjects; • participation in adaptation and development of new algorithms for EEG FTS patterns analysis; • development of a generic computational model of a system which comprises multitude of mutually affecting oscillators (in collaboration with WG1), and • modelling the observed phenomena
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