In 1960, Eleanor Gibson and Richard Walk conducted an experiment to see whether depth perception is an inborn or a learned skill in humans. They conducted their experiment with a table that had a thick glass surface on half of the table and a solid base on the other half. This created an illusion of a small cliff without the dangers of actually falling. In this experiment, infants ranging from the age of 6 to 14 months were placed on the solid side of the table. The infants’ mothers were placed on the other side of table and were there to coax the infants to the other side. Of the 30 infants tested, 27 of them crossed the glass surface when called while only 3 refused.
Gibson and Walk conducted the same experiment on newborn chickens and goats with astonishing results. When chickens and goats were placed on the solid side, not a single one of them made an error to cross the “cliff.” The same test was conducted on baby rats whose results fared far worse than the results of the chickens and goats. The rats fared worse because they are nocturnal animals who rely on other senses other than vision to direct them. From this experiment, Gibson and Walk concluded that depth perception was inborn to all animals and humans by the time they achieve independent movement. This is in the case of chickens and goats at birth and for humans at around 6 months of age.
The results of Gibson and Walk’s experiment are very questionable because their control group did not consist of any socially dependant animals. Infants are socially dependent of their mother for survival and nurturing throughout their childhood. Gibson and Walk should have conducted their control experiment on socially dependant animals such as elephants or cheetahs instead of animals that do not rely heavily on their caretaker. In 1985, Sorce, Emde, Campos, and Klinnert conducted the same visual cliff experiment with human infants and their mothers. This time, the mother was instructed to maintain an expression of fear or happiness on the other side of the “cliff.
During the twentieth century, Harry Harlow performed one of the most controversial experiments that led to a scientific breakthrough concerning the parent-child relationship. It paved the way for understanding terms such as secure, insecure, ambivalent, and disorganized relationships (Bernstein, 2014, 364). During the course of this study, Harlow separated baby monkeys from their birth mothers and isolated them in frightening environments. According to the video “H.H. Overview”, this proved the monkey’s preference for a comforting mother versus a nutritional one. However, this raises the question: can his experiments be deemed ethical, or did his scientific inquiry overstep boundaries?
According to Klaus and Kennell, there are specific events, including skin-to-skin contact between mother and infant that must occur directly following the birth of a primate infant. This maximizes the chances of survival for the newborn not only because their mother is a source of food, but also because they will learn the culture they need to be successful in their environment. In the study, Klaus and Kennell test how much time a baby spends crying when they are separated from their mother. They concluded the increased time in babies that were separated was due to the anxiety that separation caused. The difficulty in this is that the cause of the baby’s distress is subjective. Also the notion of critical period proposed that the bonds and lessons taught during that time could not be developed later.
To illustrate the ideas this essay proposes, it will first give a clear and factual overview of the Rosenberg Case. It all began even before the Rosenbergs came into the picture, namely with the arrest and confession of soviet spy Klaus Fuchs in 1950. This namely led to the investigation of his courier, Harry Gold, and then David Greenglass, Ethel Rosenberg's brother. Greenglass cooperated and named Julius Rosenberg as a fellow spy, claiming that he provided Julius with documents from the Los Alamos lab where atomic bombs were fab...
The simple optical illusions used by Ariely show us just how easily our senses can lead our judgments to be distorted. The first illusion was an animation of Shepard’s Tables; an example of size-constancy expansion first published by Roger Shepard as “Turning the Tables”. We know the two tables are the same length but yet why does one table appear to be longer than the other? In this case it is because the angles suggest depth and perspective and the brain wrongly believes one table is longer and while the other in shorter. It is interesting that despite us knowing that the tables are in fact the same length, we still perceive them to be different lengths; despite us knowing the truth, we could not get our minds to see reality as it really is. In the second example, Ariely shows the ...
Vision plays a huge role in the lives of non-human primates. Non-human primates have exceptional binocular vision, due to forward-facing eyes with overlapping visual fields (Prescott). This binocular stereoscopic color vision allows primates to see the world in terms of height, width, and depth, also known as three-dimensional vision (Haviland et al. 2010). Highly developed vision allows the later arboreal primates to judge depth, distance, and location when moving at speed from branch to branch (Haviland et al. 2010). This bino...
With such direct perception in mind, Gibson (1966) coined the term “affordances,” which are q...
The Rosenberg trial, which ended in a double execution in 1953, was one of the century's most controversial trials. It was sometimes referred to as, "the best publicized spy hunt of all times" as it came to the public eye in the time of atom-spy hysteria. Husband and wife, Julius and Ethel Rosenberg, were charged with conspiracy to commit espionage. Most of the controversy surrounding this case came from mass speculation that there were influences being reinforced by behind-the-scenes pressure, mainly from the government, which was detected through much inconsistencies in testimonies and other misconduct in the court. Many shared the belief that Ethel Rosenberg expressed best as she wrote in one of her last letters before being executed, "-knowing my husband and I must be vindicated by history.
A common area of perception that many may not think about is the ability to recognize faces. Facial recognition, however, is not consistent from infancy to adulthood but develops throughout an individual’s life. During infancy, the ability to see detail is quite poor compared to the average adult (Goldstein & Brockmole, 2017). When objects are within close distances, studies have shown that infants are able to perceive and detect a few features of the object; this idea can then be related to facial recognition in infants (Goldstein & Brockmole, 2017). The details that infants are able to perceive are associated with contrast in light, especially the difference between dark and light areas. Though this does
Baillargeon, R., & Graber, M. (1987). Where’s the rabbit? 5.5 month-old infants’ representation of the height of a hidden object. Cognitive Development, 2, 375-392.
In the early 1950s, Harry Harlow’s famous study of rhesus monkeys to determine attachment relationships demonstrated that infant rhesus monkeys raised in isolation, preferred the comfort of a cloth-covered surrogate mother to that of a wire-mesh surrogate with an attached feeding bottle. Harlow wished to dispute the traditional view that affection and mother–infant attachment was based on food, and his experiments had clearly demonstrated that the foundations of attachment were not associated solely with the need for nourishment. A more important facet of human nature was that the profoundly meaningful act of physical intimacy plays a greater role in the health of an infant than nourishment alone. (Vicedo 2009)
Studies using blind or blindfolded subjects have tested and proved the theory of mental rotation (Carpenter & Eisenberg, 1978). Carpenter and Eisenberg’s study, as well as many others which have studied mental rotation with a variety of variables (such as gender, dominant hand and intelligence), all essentially measure the effect of mental rotation through the time it takes for an individual to correctly identify whether or not an object is different, or if it’s simply the orientation that has changed (Silvia et. al., 2013). The way in which this is typically tested is by asking a subject to compare two objects (which can be 3-dimensional objects, 2-dimensional objects, or simply letters from the ...
Visual awareness in humans can affect social interaction and knowledge formation. It has always been thought that adults possess better vision than children. In the past it was thought that babies were born without vision and gained it gradually. Most of these perceptions have so far been nullified by modern research. Although the above is untrue, there are still several differences between infants’ and adults’ vision. The eye of the infant is less than half the size of an adult’s. Considering that visual ability is related to eye size, in infan...
Harlow’s experiment shows the connection of mother and child using monkeys. From this experiment you can see that withdrawal or removal can cause depression in the rhesus monkeys. Harlow further relates that to children and their mothers. Seeing that there was too much maternal contact he notes that over attachment can cause severe depression.
The Rosenberg trial's outcome was largely influenced by the political state at the time. The evidence held by the government wasn't much, but due to a combination of fear and political turmoil the evidence was more than enough to make their guilty verdict.
In the first stage sensorimotor, which occurs from birth to the age of two is the time in an infant’s life when the child basically deals with what is presented to him. They learn about physical objects and are concerned with motor skills and the consequences of some of their actions. (Thomson, Meggit 1997 P.107). During this stage children will learn the concept of object permanence. This is where an object will continue to exist even if it is out of sight. (Ginsburg, Opper 1979 P.48)