UNIMKL- 012480
University of Nottingham Malaysia Campus
Abstract:
This study is a replication of Navon’s (1977) Task which was Forest before Trees: The Precedence of Global Features on Visual Perception. Based on Navon’s (1977) experiment, figures of large letter that built up from small letter either congruent or incongruent were presented to the participants and asked to identify the local stimulus (Navon, 1977). The purpose of the experiment was to determine whether global stimuli affected the reaction time in determining local stimuli when the conditions were incongruent. There were fifty- eight undergraduate students participated in the study which was an opportunity sample. As the experiment conducted in Teaching Computer Room 2, therefore it was a laboratory experiment of a repeated measure design. The results showed that the reaction time in determining local stimuli for incongruent figure took longer time than the reaction time for congruent figure. From the results, it was concluded that the local processing was affected by the global processing.
Keywords: global features, global and local processing, visual perception, global precedence
Effect of the Congruence of Large Letter and Small Letter of Reaction Time
The continuous debate on the capability of humans in order to perceive and response when the local stimuli and global stimuli are congruent were always become an issue among psychologist. Based on the bottom- up processing theory, the whole is built from its individual elements that further proposed that the individual detect the local stimuli initially before perceiving the global stimuli. This would imply that the individual’s capability to detect the local stimuli should not be affected by the global stimulus (Kinchla & Wolfe, 1979). This theory was then supported by Gestalt psychology in which proposed the Law of Pragnanz. According to Gestalt