Motion Parallax

When learning lecture eight and the different types of perceptual organizations, one of the monocular cues that stood out to me was the concept of motion parallax. This concept is when objects that are far away seem to move much slower than the objects closer to your eyes. The example we learned in class is when you are taking the train and the trees close to the tracks and window move very fast, whereas the horizon and other distant objects seem to be passing by very slowly. This sparked my thoughts and confusion when I am traveling in an airplane. I have taken airplanes a fair amount of times and this concept has always been so confusing until we had this lesson and learned about motion parallax. The clouds and air right outside the window seemed to pass by in a matter of seconds. While on the other hand, when I looked down, it seems to take a city or part of the ocean a few minutes to completely pass below the plane. I always wondered how this could be possible since planes travel at such high speeds, for long periods of time. However, the motion parallax concept has made it easier to understand this idea. Because the plane is so high up and far away from the land, it seems to take so much longer for the land to pass, other than the objects that I can see much better up close in the window. Because of the greater distance between my eyes and the ground, it takes longer for those objects to pass. This cue, along with the others, is very interesting and explained even the simplest of ideas. The motion parallax concept specifically helped me understand why it took forever to see a city, town, or ocean below pass when traveling in an airplane.

Aerial Perspective

The eighth lecture was primarily focused on perception and how we interpret the things around us using visual cues. There are many aspects of perceptual organization, but I wanted to explain one in more detail.  Aerial perspective is defined as objects at distances that are blurred, less detailed, and lighter in color than when they are nearby.  The effect is due to the atmosphere which causes far away objects to appear “hazy” and unclear to the human eye.  Aerial perspective is a monocular cue that is used for depth perception.  Most people probably utilize aerial perspective every day when driving or walking around without even knowing it.


Aerial perspective is most easily noticed by observing natural landforms like mountains.  During the winter months, I go on many ski trips to various places such as Stowe, Vermont, with either friends or family and the landscape there is one of the best for observing aerial perspective.  As seen in the pictures above, there are many hills, trees, and objects littered throughout the landscape that have distinct shapes and colors. The colors (brown, green) and the shapes of the ground and the trees are easily visible in the foreground of the picture.  Aerial perspective is more visible in these pictures the farther out you look. The mountain ranges that are much farther out in the pictures are covered by the “haze” of the atmosphere and make colors and shapes far less distinguishable. The once browns and greens of the closer objects are non-recognizable and appear as a uniform bluish mountain range in the distance.

 

Aerial perspective provides us with monocular cues that significantly help with depth perception.  Without these cues, many things such as hitting the slopes and other activities would be hard to gauge and interpret.

Definition of Aerial Perspective found at: https://www.alleydog.com/glossary/definition.php?term=Aerial+Perspective

 

Elaborative Rehersal

One of the most easy ways to remember information, especially for young students, is to use acronyms to learn and understand concepts in school. Most students probably learned PEMDAS in math class or ROY G BIV in art class, as well as acronyms you made up on your own. Whether you made them up on your own or used the acronyms your teacher presented for you, they most likely stuck with you and helped you to remember this information.

Using acronyms to remember information is an example of Elaborative Rehearsal, which is when a person transfers information from your Short-Term Memory to the Long-Term Memory by making this information meaningful. In your short-term memory, you hold a few items for a short period of time, which is why you can use elaborative rehearsal to relate these memories in your short-term memory in order to keep it stored in the long-term memory. If you were to just try to memorize certain information, you might be able to recall it for a short period of time, but it would not be stored in your long-term memory or allow you to recall this information later in life, it would only be temporary.

In your long-term memory you have almost limitless storage and the information stored is relatively permanent, hence why you apply these acronyms in school. The information is stored in long-term memory because you have made this memory meaningful or related the acronym to prior knowledge you know. I know personally that I still remember specific things like symmetric shapes because of a song my teacher taught me in second grade which I can still recall today, retrieving it from my long-term memories because she made the song meaningful, not just straight memorization.

Blog 2: Monocular Cues – Texture Gradient

During lecture 8 we learned all about monocular cues and how they differ. I found this lecture to be very interesting but I have some difficulty knowing which one is which. To tell the difference I wanted to break down a picture which many students have experienced or at least seen here at Penn State and then discuss one of the cues.

 

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In honor of the white out this weekend I wanted to take a classic fan photo of a past PSU white out.

The first thing I wanted to point out in this picture is the difference between the people who were close to the picture and the people whom were farther away. The people close as you can see have some blue hats (and even a green hat). along with this you can see the people and their skin tones. Finally you can notice that there are people wearing different shades of white. Some whites are dull some are shiny and some are a little greyer. Now if you look towards the 50 yard line maybe even closer all you can see is layer of white. you no longer are able to distinguish one person from another. You are now unable to tell if anyone is wearing a blue hat or anything else that would stand out. If you wanted to at the opposite end of the stadium you could tell a handful of people to wear colors that would stick out, like black, red, blue, green, pink, or pretty much any color that isn’t white, and from this view you would still think everyone is wearing white and only white.

Everything I just described is a phenomena called texture gradient. This is a monocular cue which tells us that we see less detail in objects that are further away. This is why we can’t see the blue hats or the skin tones of people at the opposite end of the stadium. If you ever wonder why the people broadcasting the game always include images from high up or far away it’s because those pictures look more dramatic than they actually are.

 

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Cumberland Valley will face State College in Penn State’s Beaver Stadium on Saturday, Oct. 26

These are some classic examples of pictures that will be shown to you by the people covering the game. In these pictures it looks perfect as if everyone is wearing the correct color and we percieve it this way due to texture gradient.

 

Depth Perception: Monocular Cues

In Lecture 8, we talked about perceptual illusions, which help us understand how our perception is organized. Part of these illusions include depth perception, which enable us to judge distances. There are two types of depth perceptions: binocular cues (using both eyes) and monocular cues (using one eye). Focusing on monocular cues, this only requires one eye to obtain depth information. 

Examples of monocular cue perspectives include interposition, which allows one object to block our view of another, showing that the object that is blocking is closer. Aerial perspective, which shows that with more distant objects become fainter. An example of this could be to look at a picture of mountains with more “hazier” mountains in the background. Another example of a monocular cue is linear perspective, which involves parallel lines appear to converge with distance. The more the lines converge, the greater their perceived distance. With texture gradient, we see fewer details (texture) the farther an object is from us. Finally, motion parallax shows us that close objects appear to move more quickly than objects that are farther away. An example of this would be looking out a car window and seeing that the mountains in the back are moving at a slower pace than trees or other objects in front.

A personal experience I had when working with depth perception was when I was in art class in the 6th grade and was told to sketch a long street, with houses and stores on both sides. In order to create the illusion of depth, I needed to draw the street convergence in the distance. To do this, I had to use a linear perspective in which I created parallel lines that represented the street, that got closer or narrower as they appear farther away from the viewer. By doing this, it looked like my street was covering great distance as you looked up from the drawing. 

Retrieval Cues

When I was in high school, I was told to do a presentation  about illegal drugs, which is a totally unfamiliar topic for me. The proper nouns are difficult for me to remember and say them out. After finishing doing the power point, I began to practice it. At first I practiced it in my dormitory. I remember every sentences and points I want to talk about very well and I felt confident about the upcoming presentation. The day before the presentation date, I went to the classroom where I would give the presentation to practice for the last time. However, when I stood in front of the classroom, my mind was suddenly like a blank paper. I forgot nearly everything I planned to talk about. I felt really weird because I clearly remember I can recite everything in the dorm. So I practiced it again and again in the classroom. To my surprise, that night when I came back to the dorm, I can recall the presentation successfully again.

The example above can be explained by a psychology concept called retrieval cues. Retrieval cues are stimuli that assist in memory retrieval. In other words, retrieval cues help people access memories stored in long-term memory and bring them to your conscious awareness. The presence of retrieval cues can make recalling memories much easier.

In the example, the reason I can do the presentation well in my dorm is that the initial practice place is the dorm. The environment of the dorm is the retrieval cue. Therefore, it helped me to recall what I want to say. When I stood in front of the classroom, where the environment is totally different, I lost my cues that help me recall the words I want to say, so I seemed to forget everything. Although I have those feelings, the fact is that the presentation was already stored in my long-term memory. I did not really forget it, but hard to activate it from the long-term memory. The only difference that cause me to recall successfully and forget is with the retrieval cues or not. However, retrieval cues are not necessary. It is just a tool help people recall easier and faster. Without the dorm environment, I can still give the presentation in classroom, but it might be harder than with a retrieval cue.

Definition referred to:  https://study.com/academy/lesson/retrieval-cues-definition-examples-quiz.html

Blog post 2: Motion Parallax

When I was young, I always went to my grandparents’s home playing, which is near the airport. Each time I stood on the balcony, I can see planes flying through the sky. I asked my mother:”Why is the plane flying so slowly? I think I can run even faster than the plane. Did you say that planes are the fastest transportation in the world?” At the time my mother just told me that is because the planes are too far from us. Soon after that, I had a chance to travel by plane. During the take off and landing processes, I looked outside the window. Through the fast moved trees and buildings on the ground, I get to know how fast the plane was moving. (That is even the slowest speed during the whole flight because it is only the beginning)

The experiences showed above can be illustrated by a psychology concept called motion parallax. Motion parallax is a monocular depth cue arising from the relative velocities of objects moving across the retina of a moving person. It is what we always refer to as the object moving near us seems to move faster than the object moving farther from us.

In the example above, when I sit in the plane, objects on the ground are near to me. We can just assume it as we are near to the objects because motions are all relative. So we feel like the objects move so fast because of the small distance. Assuming that the real flying speeds are the same when it is nearly to land and during the landing period. When we see a plane in the sky, the distance between us and the object is a lot farther than what it is when we are in the plane. Because of the big distance, we feel like the plane moves very slow. But in fact, we know, the real speeds are the same. It is just we have different feelings when observing objects from different distances.

Definition referred to: https://study.com/academy/lesson/motion-parallax-in-psychology-definition-lesson-quiz.html

Can you see it?

Vision is a phenomenon between cones and rods reacting to the perception of light and the brain reading the signals from the eyes and creating a picture for us to see. I was in fifth grade when I fist noticed my vision getting fuzzy. It was minor so I didn’t mention it to my mom, but it was just noticeable enough to start to have difficulty reading the board in class. But soon it got bad enough that I couldn’t make out the board and my grades were dropping. Eventually I told my mom and we got my eyes checked out. It turns out I was near sighted. I was given glasses. My vision progressively got worse over time too. Now a days if an object is more than 5 feet away from me it is blurry almost to the point of no recognition. I have friends that are able to drive and function without their prescribed glasses or contacts. I also have friends that have perfect vision and will take my glasses and make fun of how bad my eyesight is. Poor eyesight hinders my every day life. Every morning I have to wake up unable to clearly see the world and choose whether to put on glasses, that get greasy and and dirty throughout the day, or to touch my eyeball just to put a weird flexible piece of plastic against it so I can see. These products are also expensive. Glasses can be up to a couple hundred dollars and contacts cost a few hundred dollars a year, and insurance only covers so much of it. All in all there is a big hindrance from society just because a persons eyes and brain were not wired correctly and some of us aren’t able to see without assistance from glasses or contacts.

The Feral Child: Brain Plasticity

In Dr.Wedes Psychology course we have learned about the brains plasticity and the concepts of empiricism and nativism. Nativism is the idea that our thoughts and ideas are inborn. Empiricism is the idea that knowledge is gained through experience. We now know that the brain is mostly sculpted by our genes but also relies on our experiences and changes due to plasticity. The plasticity of the brain describes the brains ability to modify itself after some type of injury or illness. We learned that the plasticity of the brain is much more resilient in children.  

While talking about the concept of plasticity concept I couldn’t help but think about Genie Wiley. In my psychology class in high school we learned about a young girl named Genie who is known as the ‘feral child’ because she lived in almost complete isolation for her entire childhood.  

 A clearly defined black-and-white close-up photograph of Genie from the chest up against an indeterminate background. Her eyes are focused slightly above and to the right of the camera, and she has an expressionless, vacant, innocent look on her face.A slightly blurry color picture of Genie, facing slightly right of the camera, walking by herself outside in the Children's Hospital recreation yard. She is wearing a plaid-patterned dress and thin sweater and looks extremely pale, emaciated, and expressionless. Her limbs are exposed and look extremely thin. Both of her knees are very bent, and her arms are bent forward with both hands hanging down as she holds them out in front of her.

Above are pictures of Genie after she was rescued. From the time she was born she spent her life locked in a small bedroom and was abused. She was not taught any form of language and was beaten any time she made any type of noise. She had trouble walking and controlling her voluntary movements. This is certainly a unique case and would be an unethical experiment but, it is an intriguing case to gain information from. Once Genie was saved by child services, she was assigned a rehabilitation team to help her. Unfortunately, the psychologist on the team described Genie as the most damaged child she had ever seen. The psychologist compared Genie’s emotional and cognitive abilities to a one year old. Although Genie was able to learn a few more words over time a linguist concluded that Genie would never be able to fully be able to comprehend or speak language (Cherry). She could not put sentences together and did not understand the idea of grammar. This helped to prove to psychologists that learning language needs to be done during a critical time in a child’s life. “The ‘critical period’ theory states that there is a very specific period when a child needs to learn their first language, or they will never have full command over the language” (Villarreal). Genie clearly missed this period in her life while she was isolated from all human interaction. 

   Brain Plasticity

https://developingchild.harvard.edu/science/key-concepts/brain-architecture/ 

This simple chart from Harvard University exemplifies how hard it can be for the brain to adapt after the age of ten and the amount of effort it requires from that point on. Genies case is unique because she suffered abuse and social isolation making her case more severe. The plasticity of Genie’s brain was not able to change or adapt even though she was experiencing new things. This is a real-life case of how important early learning and plasticity of the brain is. Since Genie’s case was so extreme her brain was unable to adapt but in many situations of damage the human brain is able to recover and adapt.

 

Works Cited 

Cherry, Kendra. “The Story of ‘Genie,” a Child Deprived of Nearly All Human Contact.” Verywell MindVerywell Mind, 30 June 2019, www.verywellmind.com/genie-the-story-of-the-wild-child-2795241. 

 

Villarreal, Daniella. “Genie Wiley: The Feral Child.” StMU History Media, 29 Mar. 2019, stmuhistorymedia.org/genie-wiley-the-feral-child/. 

 

“Brain Architecture.” Center on the Developing Child at Harvard University, developingchild.harvard.edu/science/key-concepts/brain-architecture/. 

Designing an Effective Experiment

In Lecture 3, we learned about the various different types of research that psychologists use to analyze and learn more about a myriad of various topics. Like many other scientists, psychologists love to experiment. However, there are many limitations that psychologists face when trying to come up with answers to solve the most difficult cases. That is where experimental research comes in. Experimental research makes up the backbone of most scientific research done in the psychological field, as well as in various other applications in the medical and everyday worlds. Experimental research is a great tool for researchers to use, but in order to reap the maximum benefits of it, it must be used correctly. Evidently, it is crucial to design your experiment in a way that a well-represented group of people can answer and fully understand without much difficulty.

In experimental research, the crucial element that makes or breaks studies is the concept of random sampling, which guarantees that any given person in a population has the same chance of being selected in a sample as anyone else does. This is important to note, because a sample that is hand-picked by the researcher (or skewed towards a certain demographic) can result in biased, and inaccurate results. Representing a population properly can go a long way in ensuring your results are unbiased and accurate. Many researchers look to use samples to demonstrate the characteristics of a given population, and a poorly represented sample can lead to inaccurate generalizations about the population. In addition to random sampling, there are other elements that researchers must pay attention to when creating their experiments. One of the most important aspects to watch out for is the wording of the questions asked. Surveys and experiments should be succinct, brief, and clear. Clarity is key in making sure that people accurately answer your questions or cues. In addition, experiments should utilize words and concepts that the respondents are familiar with. Wording means everything, and confusing verbiage can skew your results significantly. An example of this would be from class, when we discussed the 1992 Roper Poll in Lecture 3. The researchers asked the question, “Does it seem possible or does it seem impossible to you that the Nazi extermination of the Jews never happened?”. In this scenario, the results of the poll were quite shocking. 35% of respondents stated that it was possible that the Nazi extermination of the Jews never occurred. This is a textbook example of how wording can affect your results, as the people who answered this were quite confused by the verbiage, and didn’t quite understand exactly what the researchers were trying to ask. Simply, a majority of the people polled responded with that answer due to lack of understanding or confusion. A follow up poll conducted in 1994 proved that the respondents answered without a full and clear understanding of the question being asked, as the results were drastically different from the initial ones, thus showing the importance of ensuring a sample is easy to understand and analyze.