Navon (1977) has shown that the global characters are reacted to faster than local ones. However, this study will focus on how we perceive local characters when they are same as the global ones, and when they are different. It is based on Navon’s experiment 4 from 1977 but with the attention of the study being shifted from global characters to local ones. The participants (first year undergraduate psychology, C81MPR students) had to press the button on the keyboard as soon as they identified the local characters. The results revealed that it takes significantly longer to distinguish the local character when they are different from global features than it does to identify them when they are the same.
Introduction
We are able to perceive the world due to our ability to identify two-dimensional patterns. Many theories presumed that pattern recognition works by first processing key features, and then followed by more global or local processing to assimilate enough information to identify the two-dimensional pattern. The globality of visual property relates to how high it is on the hierarchy. As Kimchi explains, “Properties at the top of the hierarchy are more global than those at the bottom, which in turn are more local” (Kimchi, 1992). However, it seem …show more content…
Navon wanted to know if the participant could control and direct their perceptual processes, and only identify the character they were instructed to. The visual stimuli were (global) large Hs or Ss made up of (local) small Hs or Ss, in Fig. 1. He wanted the participants to detect the characters separately, thus he used “ brief presentation with post-exposure masking” (Navon, 1977), which was a mask made up of dots. In addition he feared that the participant would know exactly where the stimulus would appear, and would focus on that point. To avoid this he added randomization to the
Introduction
We are able to perceive the world due to our ability to identify two-dimensional patterns. Many theories presumed that pattern recognition works by first processing key features, and then followed by more global or local processing to assimilate enough information to identify the two-dimensional pattern. The globality of visual property relates to how high it is on the hierarchy. As Kimchi explains, “Properties at the top of the hierarchy are more global than those at the bottom, which in turn are more local” (Kimchi, 1992). However, it seem …show more content…
Navon wanted to know if the participant could control and direct their perceptual processes, and only identify the character they were instructed to. The visual stimuli were (global) large Hs or Ss made up of (local) small Hs or Ss, in Fig. 1. He wanted the participants to detect the characters separately, thus he used “ brief presentation with post-exposure masking” (Navon, 1977), which was a mask made up of dots. In addition he feared that the participant would know exactly where the stimulus would appear, and would focus on that point. To avoid this he added randomization to the