Children with and without autism were evaluated on two change detection tasks that entailed responding to 2 side-by-side images that were displayed on a computer screen. In Experiment 1, a distracter object that remained unchanged was displayed next to a target object that changed in 1 of 3 ways, a global position change, a color change, or a local deletion change. The stimuli consisted of photographs and drawings that were presented at blank intervals of either 50 or 250 ms. In Experiment 2, color and deletion changes were compared in photographs of objects and people. Children with autism were expected to demonstrate enhanced change detection across both experiments, as well as better detection of local than global changes, and superior processing of changes to objects compared to people. Across tasks, both groups performed comparably in change detection ability. Children with autism did not demonstrate enhanced visual detection, and evidenced similar patterns of visual discrimination compared to typically developing children. They also exhibited similar processing of changes to objects and people. Age was positively associated with improvements in change detection among both groups of children.
| Identifer | oai:union.ndltd.org:LACETR/oai:collectionscanada.gc.ca:QMM.85016 |
| Date | January 2004 |
| Creators | Joseph, Shari |
| Publisher | McGill University |
| Source Sets | Library and Archives Canada ETDs Repository / Centre d'archives des thèses électroniques de Bibliothèque et Archives Canada |
| Language | English |
| Detected Language | English |
| Type | Electronic Thesis or Dissertation |
| Format | application/pdf |
| Coverage | Doctor of Philosophy (Department of Educational and Counselling Psychology.) |
| Rights | All items in eScholarship@McGill are protected by copyright with all rights reserved unless otherwise indicated. |
| Relation | alephsysno: 002182303, proquestno: AAINR06308, Theses scanned by UMI/ProQuest. |
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