Event related potential correlates of intentional and incidental retrieval from episodic memory
-
1
Department of Radiation Sciences, Umeå University, Sweden
-
2
Department of Integrative Medical Biology, Umeå University, Sweden
-
3
Department of Biological and Medical Psychology, University of Bergen, Norway
Retrieval of information from episodic memory has been found to require the participation of several processes. These involve cognitive control processes, most importantly retrieval mode, that are initiated by the intention to retrieve and considered to be prerequisite for successful retrieval. On the other hand, incidental retrieval, i.e. experiencing episodic memories that arise without overt pre-existing intention or effort, is a well-known phenomenon from daily life. Relatively little is known of the processes supporting incidental retrieval. To examine the similarities and differences between intentional and incidental retrieval, we designed a retrieval task using cue words referring to previously encoded non-verbal information (concrete sounds and pictures). In the intentional retrieval condition, subjects decided whether information corresponding to cue word had been presented during the encoding session. In the physically identical incidental retrieval condition subjects performed a distracter task to minimize retrieval attempts and reported instances of incidental retrieval of the encoded information. EEG was recorded concurrently from 64 channels in 34 young healthy adult participants. The data were preprocessed in a number of steps and subjected to group-level independent component analysis (http://icatb.sourceforge.net/). Group ICA yielded eight temporally independent components which corresponded in topography and peak latency to early visual responses, N2, P3 as well as later slow waves containing a typical P600. We found a significant amplitude modulation of some of these components for the generic old vs. new effect, replicating at large the previous literature. We also found a modulation of memory-related brain activity by intentionality in components with parieto-occipital topographies in the time window of 500-700 ms after the onset of the stimulus; with the ERP amplitude higher for incidental retrieval compared with intentional retrieval condition. We discuss the findings in the context of cognitive control processes governing retrieval from episodic memory.
Conference:
10th International Conference on Cognitive Neuroscience, Bodrum, Türkiye, 1 Sep - 5 Sep, 2008.
Presentation Type:
Poster Presentation
Topic:
Memory & Learning
Citation:
Kompus
K,
Nyberg
L,
Eikeland
R,
Hugdahl
K and
Eichele
T
(2008). Event related potential correlates of intentional and incidental retrieval from episodic memory.
Conference Abstract:
10th International Conference on Cognitive Neuroscience.
doi: 10.3389/conf.neuro.09.2009.01.291
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:
09 Dec 2008;
Published Online:
09 Dec 2008.
*
Correspondence:
Kristiina Kompus, Department of Radiation Sciences, Umeå University, Umeå, Sweden, nemoABS01@frontiersin.org