PMID- 28389250 OWN - NLM STAT- MEDLINE DCOM- 20180320 LR - 20180323 IS - 1872-7697 (Electronic) IS - 0167-8760 (Linking) VI - 117 DP - 2017 Jul TI - Significance and Novelty effects in single-trial ERP components and autonomic responses. PG - 48-64 LID - S0167-8760(16)30725-5 [pii] LID - 10.1016/j.ijpsycho.2017.03.007 [doi] AB - The phasic orienting reflex (OR) was investigated in two counterbalanced blocks of an auditory dishabituation paradigm differing in stimulus Significance (operationalised as tone counting). Twelve tones were presented at very long, randomly-varying interstimulus intervals (ISIs). Novelty and Significance were varied within subjects. Stimulus-response patterns were assessed to find ERP matches for autonomic measures. The phasic OR index was represented by the skin conductance response (SCR). SCR decremented over 10 standard trials, showed recovery on trial 11 (change trial), enhancement to re-presentation of the standard tone (trial 12: dishabituation), and a main effect of Significance over the first 10 trials - demonstrating the formal criteria for an OR index. The evoked cardiac response (HR) subcomponents ECR1 (deceleration) and ECR2 (acceleration) showed no trial effects, but ECR2 showed a Significance effect. Respiratory pause (RP) decreased linearly over trials, and showed recovery, but no dishabituation or Significance effect. Temporal PCA was applied to single-trial EOG-corrected data. Ten ERP components were extracted: P1, N1-3, N1-1, PN, P2, P3a, P3b, HabP3, a Frontal Slow Wave (FSW), and the Classic SW. The dependent measures showed 4 distinct patterns. Pattern 1: No trial or Significance effects (ECR1, P1, N1-3, P3a, FSW); Pattern 2: No trial effect but a Significance effect (ECR2, N1-1, P2); Pattern 3: Trial but not Significance effects (RP, PN, P3b, HabP3); Pattern 4: Both trial and Significance effects (SCR and Classic SW). The evidenced fractionation of autonomic and central measures is compatible with Preliminary Process Theory (PPT), contrary to the notion of a unitary OR. CI - Copyright (c) 2017 Elsevier B.V. All rights reserved. FAU - MacDonald, Brett AU - MacDonald B AD - Centre for Psychophysics, Psychophysiology, and Psychopharmacology, Brain & Behaviour Research Institute, School of Psychology, University of Wollongong, Wollongong 2522, Australia. Electronic address: bm12@uowmail.edu.au. FAU - Barry, Robert J AU - Barry RJ AD - Centre for Psychophysics, Psychophysiology, and Psychopharmacology, Brain & Behaviour Research Institute, School of Psychology, University of Wollongong, Wollongong 2522, Australia. LA - eng PT - Journal Article DEP - 20170404 PL - Netherlands TA - Int J Psychophysiol JT - International journal of psychophysiology : official journal of the International Organization of Psychophysiology JID - 8406214 SB - IM MH - Adolescent MH - Adult MH - Auditory Perception/*physiology MH - Autonomic Nervous System/*physiology MH - Cerebral Cortex/*physiology MH - Evoked Potentials/*physiology MH - Female MH - Galvanic Skin Response/*physiology MH - Habituation, Psychophysiologic/*physiology MH - Heart Rate/*physiology MH - Humans MH - Male MH - Middle Aged MH - Orientation/*physiology MH - Principal Component Analysis MH - Reflex/physiology MH - Respiration MH - Young Adult OTO - NOTNLM OT - Dishabituation paradigm OT - Orienting reflex (OR) OT - Principal Components Analysis OT - Significance OT - Single-trial ERPs OT - Skin conductance response EDAT- 2017/04/09 06:00 MHDA- 2018/03/21 06:00 CRDT- 2017/04/09 06:00 PHST- 2016/10/11 00:00 [received] PHST- 2017/02/28 00:00 [revised] PHST- 2017/03/21 00:00 [accepted] PHST- 2017/04/09 06:00 [pubmed] PHST- 2018/03/21 06:00 [medline] PHST- 2017/04/09 06:00 [entrez] AID - S0167-8760(16)30725-5 [pii] AID - 10.1016/j.ijpsycho.2017.03.007 [doi] PST - ppublish SO - Int J Psychophysiol. 2017 Jul;117:48-64. doi: 10.1016/j.ijpsycho.2017.03.007. Epub 2017 Apr 4.