CHANGE BLINDNESS.docx - CHANGE BLINDNESS Imagine a person you are talking to was somehow swapped by another person during a minor interruption would you


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CHANGE BLINDNESS Imagine a person you are talking to was somehow swapped by another person during a minor interruption, would you be able to notice it? Most people would assume they would be able to but studies conducting these scenarios claim that 50% of the time, people are not able to detect the change (Simons & Levis,1998). More interestingly, the participants overlooked these changes even when they were keenly looking for any changes. Even though change detection is more likely when the change itself is very evident and visible such as when there is an instant shift from original to changed version without any diversion in attention but it becomes unexpectedly hard when the change signal is concealed from the observer’s view. Many people heavily trust the information that they perceive visually because they consider it to be the most reliable way of collecting information of the surroundings. However, studies have shown that this might not be the case and limitations can occur in our visual processing and perception. Occasionally, changes in the visual scene are not fully detected and absorbed mainly due to our attention which plays a crucial role for accurate and complete understanding of the visual scene. Change blindness occurs when people are unable to discriminate large changes that happens in a clear visual view of the observer (AccessScience Editors, 2017). The following paper will briefly describe the phenomena, review relevant literature and present evaluation on the relevant literature. At present, there are quite a few explanations to account for change blindness and one of it is related to lack of proper attention given to the stimulus. This was demonstrated by the well- known “flicker” paradigm (Rensink et al.,1997). In this paradigm, an image is shown to the observer for around half of a second followed by an altered version of the image and this is continuously repeated in rapid alternation with a blank screen amid the change in images. Observers are then required to detect the change in the images. The main findings of this experiment were that it is almost impossible for observers to detect the change from one alternation, sometimes might even require a whole minute to notice and that changes in the centre of interest were more likely to be detected than those located at the peripheral interest (Rensink et al.,1997). This suggested that it is more probable that central objects receive more focused attention than the peripheral hence having a faster rate of change detection (Rensink et al.,1997).The task used in this paradigm is done by intentional change detection where the participants are aware that there will be changes in the two alternating images and will hence keenly pay attention and find those changes and therefore illustrates that even when people are paying attention, they can easily be change blind.
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