Significance and Trial Effects from Simple Auditory Stimuli in a Dishabituation Paradigm
-
1
University of Wollongong, Australia
Aim
We investigated the effects of Significance and Novelty in an auditory dishabituation paradigm. Stimulus-response (S-R) patterns were examined for autonomic and central measures and compared to the phasic skin conductance response (SCR), ‘yard-stick’ of the orienting reflex (OR).
Method
Thirty-two undergraduates experienced auditory stimuli of 80 dB tones at 1000 and 1500 Hz, with a duration of 50 ms (15 ms rise/fall times) presented at random variable ISI of 50 – 70 s. Ten tones were presented at one frequency, then a change trial (the other frequency), and the original tone was re-presented on trial 12. Frequency and counting tasks were counterbalanced between participants. Novelty was operationalised by trial repetition and Significance by silently counting tones. The evoked cardiac responses (ECR), Respiratory Pause (RP), SCR, and single-trial ERPs from 19 sites, were collected. EOG-corrected ERP data were submitted to a temporal PCA. Measures were examined for the main effects of Novelty and Significance over the first 10 trials.
Results
Four patterns emerged. Pattern 1: no Novelty or Significance effect (ECR1 [HR deceleration], P1, N1-3, P3a, and Frontal SW). Pattern 2: no Novelty but Significance effect (ECR2 [HR acceleration], N1-1, and P2). Pattern 3: Novelty but no Significance effect (RP, PN, P3b, HabP3). Pattern 4: Novelty and Significance effects (SCR and SW).
Conclusions
The S-R patterns of the autonomic measures were consistent with previous findings. SCR showed all the characteristics of the phasic OR. The cardiac components were differentially sensitive to experimental conditions in regard to cognitive processing load. The SW, sensitive to both Novelty and Significance, appears the mostly likely ERP candidate for the OR. These results may prompt further investigations into the OR. Response fractionation was found for autonomic and central measures, consistent with PPT.
Keywords:
orienting reflex,
Preliminary Process Theory (PPT),
dishabituation,
Principle Component Analysis (PCA),
significance,
trials
Conference:
ASP2016 - The 26th Annual Meeting of the Australasian Society for Psychophysiology, Adelaide Australia, Adelaide,SA, Australia, 12 Dec - 14 Dec, 2016.
Presentation Type:
Oral Presentation
Topic:
Abstract (general)
Citation:
MacDonald
B and
Barry
RJ
(2016). Significance and Trial Effects from Simple Auditory Stimuli in a Dishabituation Paradigm.
Conference Abstract:
ASP2016 - The 26th Annual Meeting of the Australasian Society for Psychophysiology, Adelaide Australia.
doi: 10.3389/conf.fnhum.2016.221.00012
Copyright:
The abstracts in this collection have not been subject to any Frontiers peer review or checks, and are not endorsed by Frontiers.
They are made available through the Frontiers publishing platform as a service to conference organizers and presenters.
The copyright in the individual abstracts is owned by the author of each abstract or his/her employer unless otherwise stated.
Each abstract, as well as the collection of abstracts, are published under a Creative Commons CC-BY 4.0 (attribution) licence (https://creativecommons.org/licenses/by/4.0/) and may thus be reproduced, translated, adapted and be the subject of derivative works provided the authors and Frontiers are attributed.
For Frontiers’ terms and conditions please see https://www.frontiersin.org/legal/terms-and-conditions.
Received:
04 Nov 2016;
Published Online:
05 Dec 2016.
*
Correspondence:
Mr. Brett MacDonald, University of Wollongong, Wollongong, Australia, brettell08@yahoo.com