The current study was comprised of three experiments that examined face processing abilities in children (aged five to seven) diagnosed with high functioning autism as compared to control participants matched on verbal mental age and chronological age. Experiment one examined recognition memory for faces using an implicit memory task in which peripheral cues for identity were removed and distinctiveness of facial stimuli was varied. Experiment two was designed to assess gender identification skills with gender stimuli that varied in the degree of typicality of gender. Experiment three examined the recognition of facial expression of emotion using dynamic stimuli that varied in the degree of expression exhibited, from subtle to exaggerated, as evidenced by increased facial muscle movement. Results indicated children with autism exhibited significantly poorer performance on all three face processing tasks, as compared to controls. Among children with high functioning autism, results of experiment one indicated that they do not capitalize on distinctive features as a way of improving memory for faces. Results of experiment two indicated that, as compared to controls, children with autism exhibited more difficulty discriminating gender, even with typical exemplars of gender. Results of experiment three suggest that children with autism found it more difficult to identify dynamic representations of facial expressions of emotion when the expressions were more subtle in presentation. Although children with autism exhibited significantly poorer performance on all three tasks, they were still able to perform at a level above chance, indicating that by the ages of five to seven, children with autism were able to process facial information, although they were developmentally delayed when compared with controls. These results are discussed in the context of several current theories of autism and the literature of both autism and typically-developing face processing abilities.
| Identifer | oai:union.ndltd.org:PITT/oai:PITTETD:etd-04242006-200008 |
| Date | 01 June 2006 |
| Creators | Giovannelli, Joyce Lynne |
| Contributors | Daniel S. Shaw, Susan B. Campbell, Carl N. Johnson, Jana M. Iverson, Mark S. Strauss |
| Publisher | University of Pittsburgh |
| Source Sets | University of Pittsburgh |
| Language | English |
| Detected Language | English |
| Type | text |
| Format | application/pdf |
| Source | http://etd.library.pitt.edu/ETD/available/etd-04242006-200008/ |
| Rights | unrestricted, I hereby certify that, if appropriate, I have obtained and attached hereto a written permission statement from the owner(s) of each third party copyrighted matter to be included in my thesis, dissertation, or project report, allowing distribution as specified below. I certify that the version I submitted is the same as that approved by my advisory committee. I hereby grant to University of Pittsburgh or its agents the non-exclusive license to archive and make accessible, under the conditions specified below, my thesis, dissertation, or project report in whole or in part in all forms of media, now or hereafter known. I retain all other ownership rights to the copyright of the thesis, dissertation or project report. I also retain the right to use in future works (such as articles or books) all or part of this thesis, dissertation, or project report. |
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