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The process of visual perception
Literature review change blindness
Change blindness essay
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Change Blindness
After investigating spatial cognition and the construction of cognitive maps in my previous paper, "Where Am I Going? Where Have I Been: Spatial Cognition and Navigation", and growing in my comprehension of the more complex elements of the nervous system, the development of an informed discussion of human perception has become possible. The formation of cognitive maps, which serve as internal representations of the world, are dependent upon the human capacities for vision and visual perception (1). The objects introduced into the field of vision are translated into electrical messages, which activate the neurons of the retina. The resultant retinal message is organized into several forms of sensation and is transmitted to the brain so that neural representations of given surroundings may be recorded as memory (2). I suggested in my previous paper that these neural representations must be maintained and progressively updated with each successive change in environment and movement of the eye. Furthermore, I claimed that this information processing produces a constant, stable experience of a dynamic, external world (1). However, myriad studies and the testimony of any motorist who has had the unfortunate experience of hitting an unseen object, contradict the universality of that claim and illuminate a startling reality: human beings do not always see those objects presented in their visual field nor alterations in an observed scene (3,4,5,6,7,8,9). The failure to consciously witness change when distracted for mere milliseconds by saccade or artificial blink events is referred to as "change blindness." In order to comprehend this phenomenon, the physical act of looking and the process of seeing must be diffe...
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5)Cognet, a site on Cognition
http://cognet.mit.edu/perspective/item.tcl?msg_id=00005N
6)Memory For centrally attended changing objects in an incidental real world change, An article by Levin, Simons, Angelone, and Chabris
http://wjg.harvard.edu/~cfc/Levin2002.pdf
7) Scott-Brown, K.C. & Orbach, H.S. (1998) "Contrast Discrimination, Non-Uniform Patterns and Change Blindness". Proceedings of the Royal Society of London. 256 (1410): 2159-2164.
8)Max Planck Institute
http://wjg.harvard.edu/~cfc/Levin2002.pdf
9)A sensorimotor account of vision and visual consciousness , Behavioral and Brain Sciences article from 2001
http://www.bbsonline.org/documents/a/00/00/05/06/bbs00000506-00/index.html
10)Glasgow Caledonian University, current research in vision sciences
http://www.gcal.ac.uk/sls/Vision/index.htmlresearch/current_research/h.html
Marr, D. (1976). Early processing of visual information. Philosophical Transactions of the Royal Society London Ser. B, 275, 483-524.
The first, which he refers to as the “weak view” (5), is that we simply perceive with different sense modalities (e.g. touch, taste, vision, etc.). But, this view appears inadequate in the face of physiological and experiential evidence. O’Callaghan points out that neurological pathways activate in unison, and that our perception appears to us as one continuous experience, rather than subdivided into individual experiences of each different sense. (6) O’Callaghan admits that the senses often outwardly appear to be unimodal, experience does not seem broken up into different senses but appears continuous. He then goes on to support this claim with evidence from psychological
The ‘where visual pathway’ is concerned with constructing three dimensional representations of the environment and helps our brain to navigate where things are, independently of what they are, in space in relation to itself (Mishkin & Ungerleider & Macko, 1983).... ... middle of paper ... ... The 'Standard' of the 'Standard'.
The effects of perceptual load on the occurrence of inattentional blindness were demonstrated clearly by experiment. In an experiment conducted by Finch and Lavie in 2007, participants were given identical series of central cross-targets with two arms of clearly different color (blue and green) and slightly different length. Participants were split in two groups, one performing an easy task (low load condition) and the other a harder task (high load condition). The group performing the easiest task only had to make color discrimination between the tw...
Odysseus is very wise; he is able to get out of any situation he finds himself in and can also deceive anyone he finds the need to. Odysseus has the sort of cunning that one may expect to find in an action hero. However, Odysseus is able to do almost anything he wants with these skills of his. He is able to make up stories on the spot, such as when he told Athena that he was in fact not Odysseus but instead a weary traveler from Krete. Said he, “Far away in Krete I learned of Ithaka- in that broad island over the great ocean” (XIII, 327-328), and Athena knew it was Odysseus only because she was a goddess. Odysseus is very resourceful: he uses the things that are available to him. One instance of this trait is when he devises a plan to escape Polyphemos’s cave alive. Using the sheep as escape mechanisms is very clever. If he was not with his men in the cave, there would have been no way for them to get out. Also calling himself Nohbdy to trick Polyphemos into saying that no one hurt him is an ingenious idea. No one else would be able to execute his plan the way he did- with swiftness and bravery. O...
To conclude this essay, I like to emphazise that Rosenthal's HOT is more of an empirical hypothesis, rather than an analysis of the term ‘consciousness.’ His aim is precisely to explain the phenomena of consciousness in relation to other mental states, such as thought and perception, and while achieving this, he has elaborated a theoretical structure for comprehending the functions of our mind.
Renner, T., Feldman, R., Majors, M., Morrissey, J., & Mae, L. (2011). States of Consciousness. Psychsmart (pp. 99-107). New York: McGraw-Hill.
Attention, Perception, & Psychophysics, 40(4): 225-240. Massaro, D. W. & Warner, D. S. (1977). Dividing attention between auditory and visual perception. Attention, Perception & Psychophysics, 21(6): 569-574. Muller, N. G.; Bartelt, O. A., Donner, T. H., Villringer, A. Brandt, S. A. & Brandt, S. A. (2003).
The challenges that Homer give the protagonist is all a test of character. Odysseus continues to pass the obstacles with flying colors, but his arrogance is the one flaw that is in dire need of correction. Some of the many challenges Odysseus overcomes on his voyage home is defeating the Cicones, surviving the Island of the Lotus Eaters, outsmarting the Giant Cyclops, saving his men from Circe, Traveling to Hades, passing between Scylla and Charybdis, escaping Calypsos’ Island and many more. Odysseus survives these obstacles and uses his smarts to escape near disaster. Often times he was the only one to survive these things and his crew often lost their lives due to their own stupidity. “‘We left the island and resumed our journey in a state of gloom; and the heart was taken out of my men by the wearisome rowing. But was our own stupidity that had deprived us of the wind.’”(P127 L75-79) Odysseus shows how he is an extraordinary man by being much smarter than his crew and the men that follow him. As a part of this stripping of Odysseus, Homer shows that Odysseus is a collective symbol of Everyman. On the one hand Odysseus is a great warrior, who is extremely intelligent, noble, and a great man. Although he has many god- like qualities he is still human. He shows that he is human and like every man, because of the fact that he still has major flaws. The
Our attention is very selective when it comes to getting information from our environment. We could be looking at everything within our environment and miss changes that occur while looking. According to Rensink, O’Regan and Clark (1997), attention is a key factor, meaning when our attention is focused on the area of change then change can be detected. When we fail to detect change, it can result in change blindness. In support of this idea, Simons and Levin (1998) suggest that change blindness occurs if there is a lack of “precise” visual representation of their surroundings. In other words, a person can be looking at an object and not fully notice a change.
Perception is defined as the awareness of the world through the use of the five senses, but the concept of perception is often used to isolate one person’s point of view, so how reliable can perception be if no one person’s is exactly the same? The word perception itself is riddled with different, well, perceptions of its meaning. When some hear the word, they might automatically think of it as something innately flawed, that can easily be fooled by illusions, while others may think of its usefulness when avoiding scalding a hand on a hot stove. I am here to agree with both and to argue that perception is something necessary and helpful, and something that should be scrutinized for its flaws. By looking at perception as a way of knowing in the context of memory and human sciences, it can be concluded that perception can contribute to the acquisition of knowledge by constructing a foundation on which incoming stimuli from the environment are able to be quickly interpreted and acted upon, but perception can also hinder the acquisition of knowledge by wrongly interpreting those stimuli, causing inappropriate reactions.
Each one of us lives in our own unique world of perception. As individuals, we may experience life in an entirely different way through our senses and life experiences. Therefore, perception can be tricky since it is very personal to each one of us. According to the Merriam-Webster online dictionary, perception has three meanings; (1) “the way you think about or understand someone or something,” (2) “the ability to understand or notice something easily,” and, (3) “the way that you notice or understand something using one of your senses” (2014, para. 1). C.S. Lewis said, “What you see and what you hear depends a great deal on where you are standing. It also depends on what sort of person you are” (n.d., para. 11). In other words,
“Consciousness is defined as everything of which we are aware at any given time - our thoughts, feelings, sensations, and perceptions of the external environment. Physiological researchers have returned to the study of consciousness, in examining physiological rhythms, sleep, and altered states of consciousness (changes in awareness produced by sleep, meditation, hypnosis, and drugs)” (Wood, 2011, 169). There are five levels of consciousness; Conscious (sensing, perceiving, and choosing), Preconscious (memories that we can access), Unconscious ( memories that we can not access), Non-conscious ( bodily functions without sensation), and Subconscious ( “inner child,” self image formed in early childhood).
There are many different Visual Perception principles in perception. The main principles are Gestalt. Gestalt is a German word meaning 'form' or 'shape'. Gestalt psychologists formulated a series of principles that describe how t...
Blakslee, S. (1993, August 31). The New York Times. Retrieved May 2, 2014, from www.nytimes.com: http://www.nytimes.com/1993/08/31/science/seeing-and-imagining-clues-to-the-workings-of-the-mind-s-eye.html