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Our perception of the world is dependent on our senses and response to stimulus. Sensation is the process of absorbing energy from a physical stimulus in the environment and converting this energy into neural impulses and sending them to the brain. The brain then interprets and organises this sensory information resulting in our subjective conscious experience or perception. (Lefton & Brannon 2003) The five human sensory organs receive the stimulus which determines our perception. Arguably the most important of these senses is vision. Humans use sight to gain the most sensory information, and the sense of sight has evolved to be highly sophisticated. Importantly, vision depends on the presence of light. (Sparknotes, 2016) To study the effect of light on human perception, I conducted an exercise of watching a sunset. The following essay describes my experience of observing the sunset at St. Kilda beach on the 12th of April 2016, and an interpretation of the experience in relation to biological mechanisms.
One important feature of light perception is brightness. When I first arrived at St. Kilda beach at 4pm, the scenery was extremely bright. The sun was in clear sight, unobstructed by the dissipating clouds and
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Cones cells distinguish between different wavelengths of light, thus allowing us to see in colour. (Sparknotes 2016) This is why the colours were distinct during the light period. Since cones aren’t used in dim light, this explains why it was difficult to see colours in low light. Interestingly, since nothing categorically distinguishes the visible spectrum of electromagnetic radiation from invisible portions of the broader spectrum (reference), colour is a mere feature of visual perception of the observer. Thus, human experience of colour is subjective. This explains why I saw the sky as a bright orange as the sun was setting and my friend saw a darker
Another speaker, Margaret Livingstone delves into the visual aspect of our senses. Livingstone mentions how artists recognize things about vision that neuroscientists are not privy to until years later. Livingstone discussed the differentiation between color and lightness, and how the two contribute differently to a work of art. Color is thought of as “comparing activity” whereas light is thought of as “summing them.” Livingstone indicates that the visual system is subdivided into a ventral system and a dorsal system.
One of the most common American proverbs is the expression to “never judge a book by its cover”. This saying, used for more than just books, is commonly used to express that what is on the appearance of something might not always show that things true nature or content. Even so people will often forget this fact and rely on their own perception. So what does this say about perception? To Victor Hugo author of the novel Les Misérables this would probable show that human perception is flawed and that people trust it more than they should. In Victor Hugo’s novel Les Misérables he suggests that by following only our perception will not always lead to the truth, with the characters of Thénardier, Jean Valjean, and Inspecter Javert.
For example, he argues, that the experience of temperature can be understood with the analogy of the experience of pain, and just as the pain is not 'in the needle', so the warmth I feel is not in the fire. (2) He then argues in a similar vein that visual experience is reducible to collections of colour sensations because light passes into the eye ball and strikes the retina, in much the same way that a sharp object striking the skin produces a sensation of pain, such as a sensation of blue or red. (3) The sensation being the effect of the physical and chemical properties of the world on the sense organs and is as distinct from the world as photographic images are from the objects which cause them.
Gibson (1979) developed an ecological approach to the study of visual perception, which is a new and radical approach to the whole field of psychology that humans perceive their environment directly without mediation by cognitive process or by mental entities. According to his assertion of direct perception, there is enough information in our environment to make sense of the world (Gibson, 1977). Gibson (1979) said “direct perception is an activity of getting information from ambient array of light” (p. 147), and further called this a process of information pickup. That is, there is no need for mental processing since every object and event in the world have inherent meanings that are detected and exploited by humans. So his perception is based on information, not on sensations, which is in contrast with the conventional perspective of perception.
As a child growing up, I always knew I did not see colors the same way other kids did. It was not until I was older, and had an eye injury, that it was realized that I was color blind. When I would tell my peers that I was color blind I always got questions like, “What color is my shirt?” and “What color is the sky?’ These questions soon became annoying, and I stopped telling people I was color blind because I do see colors. I have problems distinguishing between the colors blue and purple, red and green, red and orange, green and brown, and so on. It is the hues that are a problem for me
Color Vision Development in Infants: The Responsibility of Cone Types and Wavelength in Order of Color Development
Color seems like a unique topic that researchers have been examining for quite some time. Various people have claimed that how we perceive color is the same universally and cross-culturally. We essentially see what is visible to our human eyes through a very small chunk of what is known as the electromagnetic spectrum. Although people with normal sight perceive this visible section of colors the same way, there is more contemporary research which points out that the way we categorize and think about color is more complex then it is made out to be. In this paper, I aim to discuss how there is support regarding how different cultures and languages do affect the way we understand and think about color. However, I believe there is much more close studying and research needed in the future to make more exceptional claims involving color perception to conclude that it is either solely universal or reliably dependent on one’s culture and language.
Sensation refers to the process of sensing what is around us in our environment by using our five senses, which are touching, smell, taste, sound and sight. Sensation occurs when one or more of the various sense organs received a stimulus. By receiving the stimulus, it will cause a mental or physical response. It starts in the sensory receptor, which are specialized cells that convert the stimulus to an electric impulse which makes it ready for the brain to use this information and this is the passive process. After this process, the perception comes into play of the active process. Perception is the process that selects the information, organize it and interpret that information.
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.
With each of our senses (sight, smell, touch, taste, and hear), information is transmitted to the brain. Psychologists find it problematic to explain the processes in which the physical energy that is received by the sense organs can form the foundation of perceptual experience. Perception is not a direct mirroring of stimulus, but a compound messy pattern dependent on the simultaneous activity of neurons. Sensory inputs are somehow converted into perceptions of laptops, music, flowers, food, and cars; into sights, sounds, smells, taste ...
Light is what lets you experience colour. The pigment of the retina in your eyes is sensitive to different lengths of light waves which allows you to see different colours. The wavelengths of light that humans can see are called the visible colour spectrum.
Perception is a mysterious thing; it faces a lot of misconception, for it can merely be described as a lens, as it decides how someone views the events happening around them. Perception is the definition of how someone decides to use their senses to observe and make conceptions about events or conditions they see or that are around them. Perception also represents how people choose to observe regardless if it’s in a negative or positive way. In other words, perception can be described as people's cognitive function of how they interpret abstract situations or conjunctures around them. All in all, perception can do three things for someone: perception can change the way someone thinks in terms of their emotions and motivations, perception acts
One sub-system under the sensory system is the visual system; the main sense organs of this are the eyes. The eye is the sensory organ that allows us to detect light from external stimuli. When a light ray is detected, the eye converts these rays into electrical signals that can be sent to the brain in order to process the information and giv...
The innovation of man brings with it both positive and negative impacts to the environment. However, in most cases, it is when the negative consequences become apparent that creativity of humans is called into action. The discovery of energy-saving LED lighting was a masterstroke that increased the durability of light bulbs while only using a fraction of the amount of energy used by the orange sodium lights. However, the steady increase in the use of the blue-white lighting is causing far-reaching consequences to human beings environment, and wildlife (Falchi, Fabio, et al 2716). Various researchers and authors have written about the adverse effects of light pollution resulting from increased use of LED lighting. The purpose
The Eye is the organ of sight. Eyes enable people to perform daily tasks and to learn about the world that surrounds them. Sight, or vision, is a rapidly occurring process that involves continuous interaction between the eye, the nervous system, and the brain. When someone looks at an object, what he/she is really seeing is the light that the object reflects, or gives off.