Date of Award
Honors Thesis (Open Access)
Colby College. Psychology Dept.
Categorization of animals and vehicles in different contexts was investigated in three experiments using event related potentials (ERPs). The presence of a background and congruency of the background in relation to the object were both manipulated in order to determine the effects of context on visual processing. In Experiment 1, adults were presented with images of animals and vehicles in two conditions: situated in a congruent context (e.g. an animal in a field) and in the absence of a context (an animal in a white homogeneous background). In experiment 2, adults were presented with images of animals and vehicles in two conditions: situated a congruent context, and situated in an incongruent context (e.g. an animal in a parking lot). Experiment 3 served as a control, in order to test for effects of the images in the incongruent condition having been computer-graphically manipulated and therefore looking less natural than the images in the congruent condition. Latencies of N170, N250 and P300 components were analyzed in different brain regions. The findings show that processing of animals and vehicles is facilitated by the presence of a context and the congruency of the context.
Perception -- Testing, Memory -- Testing, Categorization (Psychology) -- Testing
Recommended CitationWalker, Linsey, "Effects of context of natural and artifactual objects on categorization" (2008). Honors Theses. Paper 227.
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