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  • ERP Correlates of Identity Negative Priming

    ERP Correlates of Identity Negative Priming

    Jrg Behrendt1,3 Henning Gibbons4 Hecke Schrobsdorff1,2

    Matthias Ihrke1,3 J. Michael Herrmann1,2 Marcus Hasselhorn1,3

    1 Bernstein Center for Computational Neuroscience Gttingen2 University of Gttingen, Institute for Nonlinear Dynamics

    3 Georg-Elias-Mller-Institute for Psychology, GttingenSection for Educational and Developmental Psychology

    4 Section for Biological Psychology

    Psychologie & Gehirn 2007, Dortmund; Symposium 11Electrophysiological Correlates of Negative Priming

    gttingen

  • ERP Correlates of Identity Negative Priming

    Outline

    1 Introduction

    2 Identity Negative Priming Paradigm

    3 Behavioral Results

    4 Correlates of Negative Priming

    5 Correlates of Single Object Trials

    6 Discussion

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  • ERP Correlates of Identity Negative Priming

    Introduction

    Introduction

    BCCN Gttingen Project C4

    aging effects in selective attention

    joint project of modelers and experimentalists

    NP as main research tool

    EEG recordings to access internal mechanisms

    a modelers interest in ERPs...... will not be this talks topic

    clarification of variance

    localization of mechanisms in time and space

    identification of processing steps

    single trial fitting

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  • ERP Correlates of Identity Negative Priming

    Identity Negative Priming Paradigm

    Identity Negative Priming Paradigm

    time

    Prime Probe

    reactionresponse stimulus interval

    01500 ms 500 ms

    stimulus onset

    continuous identity priming paradigm with speech reaction

    green target, red distractor

    randomized response-stimulus interval 500-2000 ms

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  • ERP Correlates of Identity Negative Priming

    Identity Negative Priming Paradigm

    Stimulus Material

    *

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  • ERP Correlates of Identity Negative Priming

    Identity Negative Priming Paradigm

    Stimulus Material

    *

    equalsaturation

    equalcovered area

    balancedrecognizablity

    similarcomplexity

    plosive [b]beginning

    experimentallyoptimized

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  • ERP Correlates of Identity Negative Priming

    Identity Negative Priming Paradigm

    Experimental SetupGeneral

    identification task

    continuous presentation

    voice-key recording

    Conditions8 priming conditions

    balanced in each block

    randomized RSI 5002000 ms

    Recording

    64 channels

    extended 10-20 system

    reference: FCz

    Subjects

    16 young subjects

    age = 26y , SD = 5y

    Design

    30 test trials

    20 baseline trials pre and post, single objects

    20 blocks with 40+2 trials 840 trials

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  • ERP Correlates of Identity Negative Priming

    Identity Negative Priming Paradigm

    Standard Priming Conditions

    NP

    Prime Probe

    PP

    CO

    probe distractor present

    Control (CO): 16%

    Positive Priming (PP): 13%

    Negative Priming (NP): 12%

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  • ERP Correlates of Identity Negative Priming

    Identity Negative Priming Paradigm

    Single Object Priming Conditions

    NPSO

    Prime Probe

    PPSO

    COSO

    single probe target

    Control (COSO): 10%

    Positive Priming (PPSO): 10%

    Negative Priming (NPSO):11%

    post-SO trials

    excluded from analysis

    Control (SOCO): 16%

    Positive Priming (SOPP): 14%

    no Negative Priming

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  • ERP Correlates of Identity Negative Priming

    Behavioral Results

    Behavioral Results

    with probe distractor

    RT SD effect Cohen d[ms] [ms] [ms] effect

    CO 779 196 PP 641 136 138 0.967NP 808 210 -29 0.149

    without probe distractor

    RT SD effect Cohen d[ms] [ms] [ms] effect

    COSO 696 184 PPSO 620 148 76 0.533NPSO 715 194 -19 0.092

    control PP NP

    0200

    400

    600

    800

    React

    ion T

    ime [m

    s]

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  • ERP Correlates of Identity Negative Priming

    Behavioral Results

    Behavioral Results

    with probe distractor

    RT SD effect Cohen d[ms] [ms] [ms] effect

    CO 779 196 PP 641 136 138 0.967NP 808 210 -29 0.149

    without probe distractor

    RT SD effect Cohen d[ms] [ms] [ms] effect

    COSO 696 184 PPSO 620 148 76 0.533NPSO 715 194 -19 0.092

    COSO PPSO NPSO

    0200

    400

    600

    800

    React

    ion T

    ime [m

    s]

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  • ERP Correlates of Identity Negative Priming

    Behavioral Results

    Distractor Presence or Absence

    control PP NP

    02

    00

    40

    06

    00

    80

    0

    Re

    act

    ion

    Tim

    e [

    ms]

    COSO PPSO NPSO

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  • ERP Correlates of Identity Negative Priming

    Correlates of Negative Priming

    EEG Data Processing

    downsampling to 500Hz

    band pass filter: [0.2,20]Hz

    conditional segmentation [-100,1500]ms

    baseline correction for [-100,0]ms

    ocular correction (Gratton & Coles), VEOG channel: FPz

    reconstruction of FPz = (FP1+FP2)/2

    low cutoff filter 0.5Hz

    baseline correction for [-100,0]ms

    artifact rejection, bounds [-100,100]V) 10% trials excluded

    new reference: (TP10+TP9)/2, reconstruction of FCz

    average

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  • ERP Correlates of Identity Negative Priming

    Correlates of Negative Priming

    Statistical Analysis of the ERPs

    Hypothesis

    left-parietal predominance of P3 amplitude of primed trialscompared to CO [Stahl,Gibbons in press]

    Procedure

    systematic analysis of components

    clustering of electrodes for analysis

    lateralization: {P1, P3, P5, P7} {P2, P4, P6. P8}

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  • ERP Correlates of Identity Negative Priming

    Correlates of Negative Priming

    ERP Analysis

    NPPPCO

    1s

    10

    V

    Fp1 Fp2

    F3 F4

    C3 C4

    P3 P4

    O1 O2

    F7 F8

    T7 T8

    P7 P8

    Fz

    Cz

    Pz

    Oz

    FC1 FC2

    CP1 CP2

    FC5 FC6

    CP5 CP6

    TP9

    F1 F2

    C1 C2

    P1 P2

    AF3 AF4

    FC3 FC4

    CP3 CP4

    PO3 PO4

    F5 F6

    C5 C6

    P5 P6

    AF7 AF8

    FT7 FT8

    TP7 TP8

    PO7 PO8

    Fpz

    AFz

    CPz

    POz

    J. Behrendt, H. Gibbons, HS, M. Ihrke, J. M. Herrmann, M. HasselhornEvent-Related Brain Potential Correlates of Identity Negative Priming,in preparation

    gttingen

  • ERP Correlates of Identity Negative Priming

    Correlates of Negative Priming

    ERP Analysis

    NPPPCO

    1s

    10

    V

    Fp1 Fp2

    F3 F4

    C3 C4

    P3 P4

    O1 O2

    F7 F8

    T7 T8

    P7 P8

    Fz

    Cz

    Pz

    Oz

    FC1 FC2

    CP1 CP2

    FC5 FC6

    CP5 CP6

    TP9

    F1 F2

    C1 C2

    P1 P2

    AF3 AF4

    FC3 FC4

    CP3 CP4

    PO3 PO4

    F5 F6

    C5 C6

    P5 P6

    AF7 AF8

    FT7 FT8

    TP7 TP8

    PO7 PO8

    Fpz

    AFz

    CPz

    POz

    J. Behrendt, H. Gibbons, HS, M. Ihrke, J. M. Herrmann, M. HasselhornEvent-Related Brain Potential Correlates of Identity Negative Priming,in preparation

    P5 NPPPCO

    P6 NPPPCO

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  • ERP Correlates of Identity Negative Priming

    Correlates of Negative Priming

    ERP Analysis

    NPPPCO

    1s

    10

    V

    Fp1 Fp2

    F3 F4

    C3 C4

    P3 P4

    O1 O2

    F7 F8

    T7 T8

    P7 P8

    Fz

    Cz

    Pz

    Oz

    FC1 FC2

    CP1 CP2

    FC5 FC6

    CP5 CP6

    TP9

    F1 F2

    C1 C2

    P1 P2

    AF3 AF4

    FC3 FC4

    CP3 CP4

    PO3 PO4

    F5 F6

    C5 C6

    P5 P6

    AF7 AF8

    FT7 FT8

    TP7 TP8

    PO7 PO8

    Fpz

    AFz

    CPz

    POz

    J. Behrendt, H. Gibbons, HS, M. Ihrke, J. M. Herrmann, M. HasselhornEvent-Related Brain Potential Correlates of Identity Negative Priming,in preparation

    FpZ NPPPCO

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  • ERP Correlates of Identity Negative Priming

    Correlates of Negative Priming

    Statistical Analysis of the ERPs

    Procedure

    systematic analysis of components

    No effects found for P1 ( 102ms),N1 ( 174ms), P2( 230ms) , N2 ( 270ms)

    posterior P3 ( 360ms)

    frontal positive slow wave ( 700ms)

    strong priming effect on PSW peak latency, thereforeamplitude determination with individual time windows

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  • ERP Correlates of Identity Negative Priming

    Correlates of Negative Priming

    Statistical Analysis of the ERPs

    P3 Results

    latency: main effect priming (p < .05)no individual significant effects

    amplitude: main effect priming (p < .05)significant differences of NP, PP to CO (p < .05)

    lateralization

    amplitude differences for {P1, P3, P5, P7} significantlylarger than control: NP (p < .001), PP (p < .05).

    no amplitude differences for {P2, P4, P6. P8}:NP (p < .22), PP (p < .11).

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  • ERP Correlates of Identity Negative Priming

    Correlates of Negative Priming

    Statistical Analysis of the ERPs

    PSW Results

    frontal PSW

    latency: main effect priming (p < .01)

    amplitude:differences between priming conditions (p < .001)PP NP (p < .001)PP CO (p < .05)NP CO (p < .001)

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  • ERP Correlates