Friday, November 19, 2010

Ivan Pavlov and John Watson

Pavlov’s Eperiment
Ivan Pavlov was a Russian scientist. He first studied the digestive systems in animals. Pavlov was then interested in learning how the reactions of animals in some situations worked. He wanted to know if he could make a dog salivate without the presence of food. He first gave the dog food, which made him salivate. Then, he gave the dog food and rang a bell. After a few times doing this, the dog started drooling when the bell ringed, even if food was not present. The conditioned stimulus was the bell, the unconditioned stimulus was the food and the conditioned response was the salivation of the dog. Extinction is a gradual weakening and eventual disappearance of the conditional response tendency. This occurs when the conditioned stimulus happens too many times without the unconditioned stimulus. Stimulus discrimination is learning to respond to one stimulus and not another one. Pavlov had to change the route of the salivary glands and that the results of this experiment could be different with humans. Pavlov theorized that we learned through association.
John Watson
John Watson made an experiment that proved behaviors on humans. He used Little Albert and he exposed him to a white rat, a rabbit, a dog, a monkey, masks with and without hair, cotton wool, burning newspapers, etc. Two months later, Little Albert was placed near a laboratory rat and he was allowed to play with it. Little Albert was not scared. While he was playing with the rat, Watson and his assistant made a loud noise by striking a steel bar. After this, Little Albert cried and showed fear. When he was shown a rat or something close to a rat, even Watson’s white hair, he would be scared. The conditioned stimulus of the experiment was the white rat, the unconditioned stimulus was the loud noise, and the conditional response was Little Albert crying. The limitations of this experiment were that it was unethical and that it was never done again. The law of frequency states that the most often events are linked, the more powerful will be the association. The law of recency states that the response that has most recently occurred after a particular stimulus is the response most likely to be associated with that stimulus. Watson believed behaviorism was almost all of psychology since he believed that psychology was the study of human behavior. He believed that he could turn someone into whatever he wanted if he controlled his behavior.

Thursday, November 4, 2010

Sleep Studies




Delayed School Start Time Associated With Improvements in Adolescent Behaviors
This document is part of the Archives of Pediatric and Adolescent Medicine in which Judith A. Owens and some of her colleagues studied a high school in Rhode Island. They were seeing if a change in start time in school would do any difference to the performance in the school of the students. They were allowed to do this in a high school in Rhode Island. They changed the start time from 8:00 AM to 8:30 AM. The results of this experiment were incredible. Students getting less than seven hours of sleep a night was decreased amazingly by a 19.4 percent. Students who thought themselves depressed or unhappy decreased also from 65.8% to 45.1%. Also the percent of students who felt annoyed or irritated throughout the day decreased from 84% to 62.6%. I believe that if this change in time would be done in our school many things would change significantly. I would prefer to wake up later in the morning since we are more willing to learn than waking up at a normal time. 

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Why Does Lack of Sleep Affect Us Differently? Study Hints It May Be in Our Genes

The study that was carried away by Namni Goel, from the University of Pennsylvania School of Medicine in Philadelphia says that there is a gene that has to do with the way lack of sleep affects us. They decided to test 92 adults without the gene DQB1*0602 and 37 adults with that gene. They will give them two nights in which they will sleep ten hours and five nights in which they will sleep for only 4 hours. The adults with the gene were more sleepier and tired than those who did not have the gene. They also woke up more times than those without the gene. I believe that this gene would be an explanation of why some people sleep more than others but still are more fatigued than those who slept less.

 

http://www.sciencedaily.com/releases/2010/10/101025161023.htm 

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Being A Night Owl In High School Is Linked With Lower College GPA

Jennifer Peszka, from the Hendrix College made a research with her colleagues on if being awake until late hours will affect your GPA. The study was done to 89 students from 17 to 20 years old who were ready to start their freshman year in college. 34 others were tested as they finished their freshman year. An average GPA for a night owl is of 2.84 in the first year in comparison to the ones who were not, which had 3.18. I believe that sleeping late will have some effect in your grades whatsoever. Sleep is very important and you cannot stop sleeping what you need to sleep well to be performing at normal levels.

 

http://www.sciencedaily.com/releases/2009/06/090609072813.htm

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