A large body of neurological studies indicates that both hemispheres of the brain are active during different memory processes. Mixed-handers, who have very close interhemispheric interaction, have been demonstrated to have superior episodic recall compared to strong-handers, whose interhemispheric communication is not as closely integrated. Previous studies involving episodic memory and handedness have focused on intentional memory, where information is willfully encoded with the knowledge that it will be needed later. Interestingly, incidental memories, which form without conscious effort, have been found to be nearly as durable as intentional memories. This study attempted to extend previous findings indicating a mixed-handed advantage for intentional episodic memory to incidental episodic memory using a levels of processing (LOP) paradigm. Attention to incoming information at different LOP during encoding has been shown to greatly affect subsequent episodic memory performance. Deeply processed information, which has been subjected to many elaborative processes, generates more retrieval paths and is much more easily recalled than shallowly processed information, which receives little elaboration. 182 participants were induced to form episodic memories under several encoding conditions representing a continuum of LOP. Three conditions relied on incidental encoding while a fourth relied on intentional encoding. Episodic recall for word lists was tested. Results replicated earlier findings in demonstrating LOP effects as well as confirming predictions that mixed-handers superior interhemispheric interaction would lead to better performance compared to strong-handers. Handedness differences were found to extend to incidental memory, with mixed-handers engaged in deep processing yielding the best recall performance. Strong-handers were also found to make significantly more recall errors than mixed-handers, with error rate closely related to strength of handedness. The results indicate that handedness differences arise at retrieval, and suggest follow-up studies that could confirm this by stimulating hemispheric interaction via saccadic eye movements.
|School:||The University of Toledo|
|School Location:||United States -- Ohio|
|Source:||MAI 57/05M(E), Masters Abstracts International|
|Keywords:||Episodic memory, Handedness, Incidental learning, Intentional learning, Levels of processing, Memory|
Copyright in each Dissertation and Thesis is retained by the author. All Rights Reserved
The supplemental file or files you are about to download were provided to ProQuest by the author as part of a
dissertation or thesis. The supplemental files are provided "AS IS" without warranty. ProQuest is not responsible for the
content, format or impact on the supplemental file(s) on our system. in some cases, the file type may be unknown or
may be a .exe file. We recommend caution as you open such files.
Copyright of the original materials contained in the supplemental file is retained by the author and your access to the
supplemental files is subject to the ProQuest Terms and Conditions of use.
Depending on the size of the file(s) you are downloading, the system may take some time to download them. Please be