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Essay / What is change blindness? - 2072
As humans with complex categorical tendencies and visual-attentional systems, we assume that our visual representations of the world around us are accurate. Previous research explains how what we see is a watered-down version of the world around us and, specifically, how the phenomenon of change blindness contributes to this. Change blindness describes the experience of not noticing objects that are in our visual field, particularly due to an allocation of attention on the part of the individual. It has been found in previous studies that whether a stimulus is in the center of the visual field or at the periphery makes a difference in how blindness is experienced, as centrally localized changes were found to be more apparent as changes in the peripheral field. area. Our study tests change blindness in college-age participants exposed to alternating images, measuring their accuracy in describing the change as well as the speed at which the change is noticed. Test variables include the type of change (location change, color, and presence) and the location where these changes take place (central or peripheral). We predicted that color changes would be identified most accurately and quickly, and that centrally occurring object changes would also be noticed more quickly and accurately. Consenting participants saw an alternating image and its modified version (interposed by a black screen) producing a flickering effect. Subjects observed this until they indicated recognition of the change. Speed and accuracy were compared and measured for all variables. We found that a change in color was the most reliable and quickest report, followed by changes in presence and changes in location...... middle of paper ...... common factors can affect how, when and what. to what extent blindness occurs. In doing so, we are interested in the subjects' reaction times and accuracy in identifying a difference between an original image and a modified image. Other implications we seek to replicate are the effects of the type of change, including: how the modified object in question is positioned (centrally or peripherally), as well as the specific types of differences that lend themselves to being better noticed or ignored (changing the color of an object and presence or absence of an object). We hypothesize that there will be a significant effect in correspondence with color changes, both in terms of accuracy and speed. We also hypothesize that changes to the color or mere presence of an object will be significantly more noticeable when viewed centrally, as opposed to those at the periphery...