Functional characteristics of control adaptation in intermodal sensory processing
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Functional characteristics of control adaptation in intermodal sensory processing. / Melcher, Tobias; Pfister, Roland; Busmann, Mareike; Schlüter, Michael-Christian; Leyhe, Thomas; Gruber, Oliver.
in: BRAIN COGNITION, Jahrgang 96, 06.2015, S. 43-55.Publikationen: SCORING: Beitrag in Fachzeitschrift/Zeitung › SCORING: Zeitschriftenaufsatz › Forschung › Begutachtung
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TY - JOUR
T1 - Functional characteristics of control adaptation in intermodal sensory processing
AU - Melcher, Tobias
AU - Pfister, Roland
AU - Busmann, Mareike
AU - Schlüter, Michael-Christian
AU - Leyhe, Thomas
AU - Gruber, Oliver
N1 - Copyright © 2015 Elsevier Inc. All rights reserved.
PY - 2015/6
Y1 - 2015/6
N2 - The present work investigated functional characteristics of control adjustments in intermodal sensory processing. Subjects performed an interference task that involved simultaneously presented visual and auditory stimuli which were either congruent or incongruent with respect to their response mappings. In two experiments, trial-by-trial sequential congruency effects were analysed for specific conditions that allowed ruling out "non-executive" contributions of stimulus or response priming to the respective RT fluctuations. In Experiment 1, conflict adaptation was observed in an oddball condition in which interference emanates from a task-irrelevant and response-neutral low-frequency stimulus. This finding characterizes intermodal control adjustments to be based - at least partly - on increased sensory selectivity, which is able to improve performance in any kind of interference condition which shares the same or overlapping attentional requirements. In order to further specify this attentional mechanism, Experiment 2 defined analogous conflict adaptation effects in non-interference unimodal trials in which just one of the two stimulus modalities was presented. Conflict adaptation effects in unimodal trials exclusively occurred for unimodal task-switch trials but not for otherwise equivalent task repetition trials, which suggests that the observed conflict-triggered control adjustments mainly consist of increased distractor inhibition (i.e., down-regulation of task-irrelevant information), while attributing a negligible role to target amplification (i.e., enhancement of task-relevant information) in this setup. This behavioral study yields a promising operational basis for subsequent neuroimaging investigations to define brain activations and connectivities which underlie the adaptive control of attentional selection.
AB - The present work investigated functional characteristics of control adjustments in intermodal sensory processing. Subjects performed an interference task that involved simultaneously presented visual and auditory stimuli which were either congruent or incongruent with respect to their response mappings. In two experiments, trial-by-trial sequential congruency effects were analysed for specific conditions that allowed ruling out "non-executive" contributions of stimulus or response priming to the respective RT fluctuations. In Experiment 1, conflict adaptation was observed in an oddball condition in which interference emanates from a task-irrelevant and response-neutral low-frequency stimulus. This finding characterizes intermodal control adjustments to be based - at least partly - on increased sensory selectivity, which is able to improve performance in any kind of interference condition which shares the same or overlapping attentional requirements. In order to further specify this attentional mechanism, Experiment 2 defined analogous conflict adaptation effects in non-interference unimodal trials in which just one of the two stimulus modalities was presented. Conflict adaptation effects in unimodal trials exclusively occurred for unimodal task-switch trials but not for otherwise equivalent task repetition trials, which suggests that the observed conflict-triggered control adjustments mainly consist of increased distractor inhibition (i.e., down-regulation of task-irrelevant information), while attributing a negligible role to target amplification (i.e., enhancement of task-relevant information) in this setup. This behavioral study yields a promising operational basis for subsequent neuroimaging investigations to define brain activations and connectivities which underlie the adaptive control of attentional selection.
KW - Adaptation, Physiological/physiology
KW - Adult
KW - Attention/physiology
KW - Auditory Perception/physiology
KW - Conflict, Psychological
KW - Executive Function/physiology
KW - Female
KW - Humans
KW - Male
KW - Psychomotor Performance/physiology
KW - Visual Perception/physiology
KW - Young Adult
U2 - 10.1016/j.bandc.2015.03.003
DO - 10.1016/j.bandc.2015.03.003
M3 - SCORING: Journal article
C2 - 25917247
VL - 96
SP - 43
EP - 55
JO - BRAIN COGNITION
JF - BRAIN COGNITION
SN - 0278-2626
ER -