Most attention studies look at a one-on-one situation in which one sound is presented with one visual image [1]. However, we know that in an environment that is teeming with an overwhelming amount of visual, auditory, gustation, olfaction, and somatosensory input into the body. So while a one-to-one relationship in regards to vision and visual stimulus may provide a sound starting point for investigations into visual attention it may not pose the most significant results for real world application. I feel that a much more realistic, in regards to actual experiences we face, should explore how other systems interact with the visual system, and eventually, exploring how the integration of many sensory systems plays a role in visual attention.
Humans rely heavily on visual input from the environment around us. This makes sense since our senses of smell and hearing are not as sensitive as other animals. The study of visual attention investigates how the visual system is able to focus on a number of events occurring in our visual field. Visual attention also examines how many of these ev...
The ultimate goal for a system of visual perception is representing visual scenes. It is generally assumed that this requires an initial ‘break-down’ of complex visual stimuli into some kind of “discrete subunits” (De Valois & De Valois, 1980, p.316) which can then be passed on and further processed by the brain. The task thus arises of identifying these subunits as well as the means by which the visual system interprets and processes sensory input. An approach to visual scene analysis that prevailed for many years was that of individual cortical cells being ‘feature detectors’ with particular response-criteria. Though not self-proclaimed, Hubel and Wiesel’s theory of a hierarchical visual system employs a form of such feature detectors. I will here discuss: the origins of the feature detection theory; Hubel and Wiesel’s hierarchical theory of visual perception; criticism of the hierarchical nature of the theory; an alternative theory of receptive-field cells as spatial frequency detectors; and the possibility of reconciling these two theories with reference to parallel processing.
Hubel and Wiesel defined the classic receptive field as a restricted region of the visual cortex. If a specific stimulus fell into this area, this may drive the cell to evoke action potential responses (Zipser, Lamme & Schiller, 1996). By shining orientated slits of light into the cat’s eye, they were able to discover that each cell had its own specific stimulus requirements (Barlow, 1982). Different cells differed from each other in many ways; some preferred a spe...
Processing capacity is a very broad and flexible category according to many researchers. In fact, the quote above mentioned suggests that we often fail to notice things that happen just in front of us (unexpected events that are often salient) either because we were completely absorbed by something else or because we had so many things to do at the same time that we couldn’t pay attention to it. We have all at least once failed to see a friend who was waving at us while eating in the cafeteria or walking in a crowded street. The primary question that we should ask ourselves is: how many things can we attend at the same time? The truth is that we didn’t perceive this friend because of a phenomenon called “inattentional blindness”. The problem is that the richness of our visual experience leads us to believe that our visual representation will include and preserve the same amount of detail (Levin et al 2000). In this paper we’ll see the different theories of inattentional blindness, and the classical theories demonstrating this paradigm.
On the night of January 13, 2013, Jeffrey Wright was killed after causing his wife, Susan Wright, years of distress and abuse. His body was disfigured after being stabbed approximately 193 times. The body lay on his former mattress which had become blood-soaked and cut up. Attached to his wrists are ties which had been used to anchor him to the bed, making him unable to escape. His last visual memory was the sight of his wife hovering over him with a knife, wondering how she had been able to do what she was about to do. How could she, his wife, betray him and kill him with no remorse?
McDonald, J., Teder-Salejarvi, W, & Hillyard, S. (2000). Involuntary orienting to sound improves visual perception. Nature, 407, 906-907.
ABSTRACT: The aim of this paper is to defend a broad concept of visual perception, according to which it is a sufficient condition for visual perception that subjects receive visual information in a way which enables them to give reliably correct answers about the objects presented to them. According to this view, blindsight, non-epistemic seeing, and conscious visual experience count as proper types of visual perception. This leads to two consequences concerning the role of the phenomenal qualities of visual experiences. First, phenomenal qualities are not necessary in order to see something, because in the case of blindsight, subjects can see objects without experiences phenomenal qualities. Second, they cannot be intentional properties, since they are not essential properties of visual experiences, and because the content of visual experiences cannot be constituted by contingent properties.
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).
Though the experiment shows that attention is vital for change detection, we should consider the size/ impact of the change in the environment. If the change to an environment is small, would it result in the change being detected? Do providing little clues draw attention effectively to where the change is being made? In support of this argument, Rensink (1997) showed that even with small clues, if the clue is not directed properly then detecting change will not have an effect. A proposal of Rensink is that the absence of attention will cause visual contents to be missed. On the other hand, Simon and Levin (1998) suggest that a person could miss things happening in their environment if his or her attention is occupied by something
Perception, at most times, is a credible way to assess the world around us. Without perception, we would not know what to do with all the incoming information from our environment. Perception is constructed of our senses and the unconscious interpretations of those sensations. Our senses bring in information from our environment, and our brain interprets what those sensations mean. The five most commonly accepted senses -- taste, smell, hearing, sight, and touch -- all help create the world around us as we know it.
Visual Discrimination is “using the sense of sight to notice and compare the features of different items to distinguish one item from another” (NCLD Editorial Team, 2014) http://www.ncld.o...
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,
7. A: Inattentional blindness creates a limit of the visual system, which also demonstrates a critical feature of our visual processing. It also reveals the role of selective attention in perception. Inattentional blindness permits us to remain focused on significant aspects of our world deprived of distraction from irrelevant items and happenings. Inattentional blindness does have practical consequences when those unselected aspects of our world remain both unexpected yet important.
Visual perception plays a big part on how we perceive life. If we didn't have perception I don't know where we would be now.
Bach-y-Rita's experiments suggest that "we experience the five senses, but where the data comes from may not be so important" (1). In the article "Can You See With Your Tongue?" the journalist was blindfolded with a small video camera strapped to his forehead, connected to a long plastic strip which was inserted into his mouth. A lap...
Society has increasingly placed a high value on image, which has had a profound effect on people, from how to dress, talk, behave, things they idolize, or deem important. Image is a physical likeness, representation, or appearance of a person, or thing, photographed, painted, or otherwise made visible. Image is one of the oldest form of nonverbal communication used to appeal to others; people often judge your integrity, accountability, or professionalism based on appearance. Having the right image can go a long way, by providing opportunities, highlight qualities, and even present life changing experiences. Image is how someone, a group, or corporation, present themselves to the world, it tells a little about who they are. Therefore, image gives an insight to spectators, who form opinions solely on appearances, which is very important as first impressions last.