?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adc&rft.title=The+topography+of+event-related+potentials+in+passive+and+active+conditions+of+a+3-tone+auditory+oddball+test&rft.creator=Oades%2C+Robert+D.&rft.creator=Zerbin%2C+D.&rft.creator=Dittmann-Balcar%2C+A.&rft.subject=Neurophysiology&rft.subject=Perceptual+Cognitive+Psychology&rft.subject=Psychophysics&rft.description=Introduction%3A+Normalized+event-related+potential+(ERP)+data+were+analysed+for+topographical+differences+of+ERP+amplitude+or+latency+in+two+conditions+of+a+3-tone+oddball+paradigm.+The+aim+was+to+compare+perception-related+features+relating+to+tone-type+(passive+non-task+condition)+with+focussed+attention-related+features+(active+discrimination+of+target+from+non-target)+in+5+ERP+components+from+23+young+healthy+subjects.+%0A%0AMethods%3A+The+tones+used+were+a+common+standard+(70%25%2C+0.8+KHz)%2C+a+deviant+standard+(15%25%2C+2+KHz)+and+a+1.4+KHz+tone+(15%25%2C+t)+also+used+as+the+target+(T).+%0A%0AResults%3A%0Aa)A+site+x+tone+interaction+was+obtained+for+P1%2FP50+amplitude+(augmenting+with+pitch+anterior+to+posterior).+The+opposite+tendency+was+seen+for+P2+to+the+right+of+midline+maxima.%0Ab)+No+interaction+was+obtained+for+N1+amplitude.+%0Ac)+Condition+became+relevant+for+the+N2-P3+complex.+Frontal+N2+amplitude+increased+after+rare+tones+in+the+active+condition.+Posterior+P3+peak+size+distinguished+between+tone+(more+widespread+response+to+the+common+tone)+and+condition+(more+right-sided+in+the+passive+condition).+%0Ad)+The+common+tone+elicited+more+widespread+shift+to+the+right+than+the+rare+tones.+Latency+was+affected+by+condition+from+the+P2+onwards+and+confirmed+many+of+the+amplitude+interaction.+%0A%0AConclusion%3A+This+report+extends+and+qualifies+well-known+main+effects+of+tone+and+condition+through+main+site+effects+to+lateral+sites.+It+supports+claims+of+multiple+sources+of+ERP+components%2C+except+for+N1+and+P2.+The+contributions+of+these+sources+are+influenced+by+tone-features+(from+P1)+and+the+presence+or+absence+of+focussed+attention+(from+the+N2-P3+complex).+%0A&rft.publisher=Gordon+%26+Breach&rft.date=1995&rft.type=Journal+(Paginated)&rft.type=PeerReviewed&rft.format=application%2Fpdf&rft.identifier=http%3A%2F%2Fcogprints.org%2F1224%2F2%2FInt.J.Neurosc95%25281%2529.pdf&rft.identifier=++Oades%2C+Robert+D.+and+Zerbin%2C+D.+and+Dittmann-Balcar%2C+A.++(1995)+The+topography+of+event-related+potentials+in+passive+and+active+conditions+of+a+3-tone+auditory+oddball+test.++%5BJournal+(Paginated)%5D+++++&rft.relation=http%3A%2F%2Fcogprints.org%2F1224%2F