TY - JOUR
T1 - Comparing P300 modulations : target-to-target interval versus infrequent nontarget-to-nontarget interval in a three-stimulus task
AU - Steiner, Genevieve Z.
AU - Brennan, Michelle L.
AU - Gonsalvez, Craig J.
AU - Barry, Robert J.
PY - 2013
Y1 - 2013
N2 - This study examined temporal determinants of the P300 component of the ERP in a three-stimulus visual oddball task. Frequent standards, with equiprobable targets and infrequent nontargets, were utilized.We tested whether the infrequent nontarget-to-nontarget interval (infrequent NNI) influences P300 amplitudes and latencies analogously to the target-totarget interval (TTI). EEG was recorded from 27 participants, and response time and P300 effects of TTIs and infrequent NNIs were assessed. Increases in TTI augmented target P300 amplitudes and decreased latencies and response times. However, this modulation of P300 amplitude was weak for manipulations of infrequent NNI. P300 latencies increased initially before decreasing across infrequent NNI levels. Together, these findings support the notion that the P300 has an underlying temporal mechanism that is modulated by motivationally significant events. Theoretical implications are discussed.
AB - This study examined temporal determinants of the P300 component of the ERP in a three-stimulus visual oddball task. Frequent standards, with equiprobable targets and infrequent nontargets, were utilized.We tested whether the infrequent nontarget-to-nontarget interval (infrequent NNI) influences P300 amplitudes and latencies analogously to the target-totarget interval (TTI). EEG was recorded from 27 participants, and response time and P300 effects of TTIs and infrequent NNIs were assessed. Increases in TTI augmented target P300 amplitudes and decreased latencies and response times. However, this modulation of P300 amplitude was weak for manipulations of infrequent NNI. P300 latencies increased initially before decreasing across infrequent NNI levels. Together, these findings support the notion that the P300 has an underlying temporal mechanism that is modulated by motivationally significant events. Theoretical implications are discussed.
UR - http://handle.uws.edu.au:8081/1959.7/536697
U2 - 10.1111/j.1469-8986.2012.01491.x
DO - 10.1111/j.1469-8986.2012.01491.x
M3 - Article
SN - 0048-5772
VL - 50
SP - 187
EP - 194
JO - Psychophysiology
JF - Psychophysiology
IS - 2
ER -