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ERIC Number: EJ844430
Record Type: Journal
Publication Date: 2005
Pages: 11
Abstractor: As Provided
Reference Count: 16
ISSN: ISSN-0211-2159
Evaluation of the Perceptual Grouping Parameter in the CTVA Model
Santisteban, Carmen; Alvarado, Jesus M.; Cortijo, Manuel
Psicologica: International Journal of Methodology and Experimental Psychology, v26 n2 p305-315 2005
The CODE Theory of Visual Attention (CTVA) is a mathematical model explaining the effects of grouping by proximity and distance upon reaction times and accuracy of response with regard to elements in the visual display. The predictions of the theory agree quite acceptably in one and two dimensions (CTVA-2D) with the experimental results (reaction times and accuracy of response). The difference between reaction-times for the compatible and incompatible responses, known as the response-compatibility effect, is also acceptably predicted, except at small distances and high number of distractors. Further results using the same paradigm at even smaller distances have been now obtained, showing greater discrepancies. Then, we have introduced a method to evaluate the strength of sensory evidence (eta parameter), which takes grouping by similarity into account and minimizes these discrepancies. (Contains 4 tables and 2 figures.)
University of Valencia. Dept. Metodologia, Facultad de Psicologia, Avda. Blasco Ibanez 21, 46010 Valencia, Spain. Tel: +34-96-386-4100; Web site:
Publication Type: Journal Articles; Reports - Evaluative
Education Level: N/A
Audience: N/A
Language: English
Sponsor: N/A
Authoring Institution: N/A