Use this URL to cite or link to this record in EThOS: http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.584752
Title: Event related potential studies of recognition memory for faces
Author: Yick, Yee Ying
Awarding Body: Cardiff University
Current Institution: Cardiff University
Date of Award: 2009
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Abstract:
The retrieval processes supporting recognition memory for faces were investigated using event-related potentials (ERPs) and behavioural measures. The ERP old/new effects elicited by faces were investigated in five experiments in which participants were required to distinguish between old and new (studied and non-studied) faces. A direct comparison between the ERP old/new effects elicited by faces and words in an old/new recognition memory task in Experiment 1 provided evidence for at least one common old/new effect, as well as evidence for a material-specific retrieval effect that was only present for faces. The subsequent experiments employed "recognition confidence judgments" (Experiments 2 and 3) and "source memory" manipulations (Experiments 4 and 5) to separate neural activity that might be tied to the processes of recollection and familiarity. Across the two recognition confidence experiments, reliable old/new effects were evident mainly for responses that attracted high confidence judgments, and there was little evidence for modulations that were sensitive to the level of recognition confidence systematically. These data indicate that ERPs index memory processes supporting face judgments that are linked to recollection. The two source memory experiments also revealed superior old/new effects which covered both frontal and parietal scalps and which were larger for those correct old responses that attracted correct rather than incorrect source judgments. The ERP data thus provides strong evidence for neural indices of recollection across all experiments. It might be regarded as surprising that, given the findings in ERP studies with verbal materials, no strong evidence for an ERP correlate of familiarity was found in the ERP data. In Experiment 4, a mid-frontal old/new effect in the 300-500ms time window was present for all correct old responses, and was insensitive to the source judgments, suggesting that this modulation is a neural index of familiarity. This pattern of data, however, was not replicated in Experiment 5 when a more rigorous separation between familiarity- and recollection-based responding was employed. These ERP findings are considered in the context of dual-process theories of recognition memory and their broad application across markedly different kinds of studied materials.
Supervisor: Not available Sponsor: Not available
Qualification Name: Thesis (Ph.D.) Qualification Level: Doctoral
EThOS ID: uk.bl.ethos.584752  DOI: Not available
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