Central processing overlap modulates P3 latency

被引:33
作者
Dell'Acqua, R
Jolicoeur, P
Vespignani, F
Toffanin, P
机构
[1] Univ Padua, Dept Dev Psychol, I-35131 Padua, Italy
[2] Univ Montreal, Dept Psychol, Montreal, PQ H3C 3J7, Canada
关键词
central processing; P3; PRP paradigm;
D O I
10.1007/s00221-005-2281-2
中图分类号
Q189 [神经科学];
学科分类号
071006 ;
摘要
Two experiments examined the issue of the functional mechanisms exerting a modulatory effect on the latency of the P3. In experiment 1, using a psychological refractory period (PRP) paradigm, two sequential stimuli (T-1 and T-2) were presented in each trial at varying stimulus onset asynchronies (SOAs), each requiring a speeded choice response. Substantial lengthening of the reaction time to T-2 was observed as SOA decreased (i.e., PRP effect). A systematic investigation of the T-2-locked P3 component amplitude and latency was undertaken to discover whether either of these P3 parameters was correlated with the PRP effect. The results showed lengthening of the T-2-locked P3 component latency as SOA was decreased, and, across subjects, a positive correlation between the PRP effect and P3 latency lengthening. No SOA-dependent P3 amplitude variation was observed. In experiment 2, the P3 component was measured under single-task conditions. P3 amplitude was higher under single-task than under dual-task conditions, but no SOA-dependent latency variations were observed in this experiment. Overall, the results of both experiments support the notion that part of the processing reflected in P3 activity occurs at or after the locus of the PRP effect, thus suggesting strongly that central mechanisms are involved in P3 latency variations.
引用
收藏
页码:54 / 68
页数:15
相关论文
共 48 条
[1]   Dissociating sources of dual-task interference using human electrophysiology [J].
Arnell, KM ;
Helion, AM ;
Hurdelbrink, JA ;
Pasieka, B .
PSYCHONOMIC BULLETIN & REVIEW, 2004, 11 (01) :77-83
[2]  
Bourke PA, 1996, Q J EXP PSYCHOL-A, V49, P525, DOI 10.1080/713755635
[3]   P3 WAVES TO DISCRIMINATION OF TARGETS IN HOMOGENEOUS AND HETEROGENEOUS STIMULUS SEQUENCES [J].
COURCHESNE, E ;
HILLYARD, SA ;
COURCHESNE, RY .
PSYCHOPHYSIOLOGY, 1977, 14 (06) :590-597
[4]   Loci of signal probability effects and of the attentional blink bottleneck [J].
Crebolder, JM ;
Jolicoeur, P ;
McIlwaine, JD .
JOURNAL OF EXPERIMENTAL PSYCHOLOGY-HUMAN PERCEPTION AND PERFORMANCE, 2002, 28 (03) :695-716
[5]   Electrophysiological evidence of visual encoding deficits in a cross-modal attentional blink paradigm [J].
Dell'Acqua, R ;
Jolicoeur, P ;
Pesciarelli, F ;
Job, R ;
Palomba, D .
PSYCHOPHYSIOLOGY, 2003, 40 (04) :629-639
[6]   Parsing the late positive complex: Mental chronometry and the ERP components that inhabit the neighborhood of the P300 [J].
Dien, J ;
Spencer, KM ;
Donchin, E .
PSYCHOPHYSIOLOGY, 2004, 41 (05) :665-678
[8]   IS THE P300 COMPONENT A MANIFESTATION OF CONTEXT UPDATING [J].
DONCHIN, E ;
COLES, MGH .
BEHAVIORAL AND BRAIN SCIENCES, 1988, 11 (03) :357-374
[9]   Common regions of the human frontal lobe recruited by diverse cognitive demands [J].
Duncan, J ;
Owen, AM .
TRENDS IN NEUROSCIENCES, 2000, 23 (10) :475-483
[10]  
DUNCANJOHNSON CC, 1981, PSYCHOPHYSIOLOGY, V18, P207