nature of cognitive representations for familiar and unfamiliar faces
Published: 2004
Language: eng
Number of pages: 99
Description: These findings indicate that the cognitive mechanism that mediates the perception of faces is adapted for associating different exemplars of the same face together, but is unable to integrate exemplars of two different faces. The general discussion (Chapter Five) focuses on implications of these findings for theories of face perception and recognition.This research examined the nature of the cognitive representations mediating perception, priming, and explicit memory for faces. Explicit tests of memory involve an intent to recollect information from a prior episode. With implicit tests of memory, however, there is no intent to recollect but rather memory is revealed indirectly through performance facilitation on tasks that do not require reference to a prior episode.Priming for new associations was examined using three different types of pairs: unfamiliar different-person (Chapter Two), unfamiliar same-person (Chapter Three), and familiar same-person (Chapter Four). Same-person pairs consisted of different exemplars of the same-individual; different-person pairs consisted of pictures of two different individuals. All types of pairs were encoded under either deep (e.g., honesty or friendship judgments) or shallow (e.g., picture shading or left-right judgments) instructions. Following encoding, both implicit and explicit memory were assessed with accuracy and reaction time measures. Associative memory was measured by comparing test performance between intact and recombined pairs; intact pairs consisted of two faces paired together both at study and test whereas recombined pairs consisted of faces seen during study that were re-paired with other previously-studied faces. Item memory was measured by comparing test performance between intact and new pairs; new pairs were composed of either one new and one previously-seen face or two new faces.Consistent with previous research with verbal stimuli, explicit memory for faces was generally best for intact versus recombined pairs and following deep versus shallow encoding. Implicit memory test performance revealed strong and reliable associative priming effects but only for unfamiliar same-person pairs (i.e., two different images of the same unfamiliar person) and only following deep encoding instructions (Chapter Three). Reliable item priming effects were obtained with unfamiliar same-person and familiar same-person pairs, but not with unfamiliar different-person pairs.
Notes: Adviser: Morris Moscovitch.

Thesis (Ph.D.)--University of Toronto, 2004.

Electronic version licensed for access by U. of T. users.

Source: Dissertation Abstracts International, Volume: 65-05, Section: B, page: 2673.