viernes, 26 de noviembre de 2010

Classical Conditioning Questions

Ivan Pavlov:
1. What was Pavlov actually studying when he developed his theory of classical conditioning?
Pavlov was originally studying and researching about the physiology of digestion. This research then led him to develop a science in which reflexes are conditioned.

2. Explain (in detail) how Pavlov's experiment was conducted.
Pavlov in his experiment studied the salivation of dogs. Dogs would usually salivate when food is presented. What really interested Pavlov was the fact that when dogs saw the people that usually fed them, they started to salivate. To prove this he had to condition the dogs.
Before the conditioning
1-     The dog was presented with food, and as a response it salivated.
2-     The bell was rung, but there was no response from the dog.
During conditioning:
3-     The bell was rung, and the food was then presented to the dog. As a response the dog began to salivate.
After conditioning:
4-     The bell was rung, no food was presented, but as a response the dog still salivated.
5-     After a few times of ringing the bell and no food been presented, the dog stopped salivating.

3. Identify the conditioned stimulus, the unconditioned stimulus and the conditioned response from Pavlov's experiment.
UNCONDITIONED STIMULUS (UCS) - the food
UNCONDITIONED RESPONSE (UCR) - the salivation to the food
CONDITIONED STIMULUS (CS) - the bell
CONDITIONED RESPONSE (CR) - the salivation to the bell
4. Explain what extinction means in relation to classical conditioning.
Extinction is when the conditioned response disappears after presenting the conditioned stimulus frequently without the unconditioned stimulus. The dog learned to correlate the sound of the bell with food. Then, the bell was rung frequently but no food was presented. Soon after a few times, the salivation of the dog stopped at the sound of the bell.
5. Explain what stimulus generalization means in relation to classical conditioning.
It is when the conditioned response is extended from the original stimulus to similar stimuli.

6. Explain what stimulus discrimination means in relation to classical conditioning.
It is when a person or an animal is taught to discriminate and differ between various presented stimuli.

7. Explain at least two limitations of this experiment.
Some limitations are that what is learned is partial since most responses should involve a reflex.
Another thing is that the experiment is not easy to reconstruct since it is pretty complicated.

8. Explain what Pavlov theorized about how we learn.With Classical Conditioning, Pavlov theorized that there is learning by association. Most behaviors consist on learned responses to certain signals or events happening in the environment according to this. In the same way, in order to fit in their environment and be able to survive, organisms have to adapt to varying conditions presented to them.

John B. Watson:
1. Explain (in detail) how Watson's "Little Albert" study was conducted.
Little Albert was a baby who underwent a series of experiments around the age of nine months. This child was exposed to a white rat, a rabbit, a monkey, masks, fur coats, and burning newspapers. These things were all a series of stimuli. As these things were presented to him, Watson observed the child’s reaction to them. Initially, little Albert did not show any kind of fear towards the objects he was shown.
Later on, the next time little Albert was exposed to these objects; Watson made loud noises by hitting a metal pipe with a hammer. Obviously, the little boy started to cry after listening to these hard noises. After pairing the objects with the frequent noise, the baby began to cry simply after seeing the objects he was exposed to.

2. Identify the conditioned stimulus, the unconditioned stimulus and the conditioned response from Watson's study
UNCONDITIONED STIMULUS (UCS) – Loud noise
CONDITIONED STIMULUS (CS) - white rat, a rabbit, a monkey, masks, fur coats, and burning newspapers
CONDITIONED RESPONSE (CR) - fear

3. Explain at least two limitations of this study.
The limitations are that both the experimental design and process were not carefully constructed, and by ethical concerns the experiment cannot be replicated because it means using a baby.

4. Explain Watson's law of frequency.
In this law he expressed the importance of repetition. The more frequent a stimulus and its response occur, the stronger the tendency will become.

5. Explain Watson's law of recency.
It states that the response to be the mostly associated with a certain stimulus is the response that occurred after that particular stimulus.

6. Explain the basic assumptions of behaviorism according to Watson.
According to Watson, behavior is the product of a stimulus and it can be determined by our surroundings. Events like thinking and feeling are observable behaviors that are a main fret of behaviorism.

Works Cited:

lunes, 1 de noviembre de 2010

ARTICLE SUMMARIES:

High School Students with a Delayed School Start Time Sleep Longer, Report less Daytime Sleepiness
    Zaw W. Htwe, MD, of Norwalk Hospital's Sleep Disorders Center in Norwalk, Conn., conducted a study on 259 high school students. Before starting the experiment, the students had to complete a questionnaire about their sleep. Throughout the questionnaire, they realized that high school teens just got 7 hours of sleep during weekdays since their bed-time was around 10:52 p.m., and their wake-up time around 6:12 a.m. After delaying school start time for forty minutes, there were drastic changes. Students got to sleep more. During school hours, there were fewer complaints from the students about feeling sleepy. Mary B. O'Malley, MD, PhD also stated that through this study it was evident that teens preferred to sleep more than to extend their activities on school nights. To be honest, I think that delaying school start time can benefit teens around the world. They would be able to sleep more and be more efficient during school hours. After all, the hardest part of a day for a teen is waking up, especially early.

Starting High School One Hour Later May Reduce Teen Traffic Accidents
        Barbara Phillips, MD, director of the UK Healthcare Good Samaritan Sleep Center in Lexington, Ky., and others say that early school starts impair the students’ way of learning, attendance, and safety driving. That is why there was a study conducted in the entire county-wide school district in Kansas in the month of April on the years of 1998 and 1999. Students from 6th to 12th grade were involved. On year one (1998) students were asked to complete a questionnaire about their sleep habits. The school start time was not changed; it was kept the same, at 7:30am for high schools, and 8:00 am for middle schools. On year two (1999) students were also asked to complete questionnaires, but this time they had to complete one before and another one after the change in school start time. Schools started one hour later, 8:30 am for high schools and 9 am for middle schools. It was realized that the county crash rates were higher when the school start time was kept the same. On the other hand, when the school start time was delayed, the rate of automobile accidents amongst teens decreased. In my opinion, many accidents not only in cars occur because of the lack of sleep. This happens especially on teenagers who are still developing and need to sleep in order to function well. Delaying school start time would not only benefit teenagers on the road but drivers in general, especially in the mornings.

Delayed School Start Time Associated With Improvements in Adolescent Behaviors
              There was a study accomplished on 201 students from grades 9 – 12 from different high schools in Rhode Island by Judith A. Owens, M.D., M.P.H., of the Hasbro Children's Hospital, Providence, and some of her colleagues. The school start time was delayed by 30 minutes. After this delay, students had to complete a survey about their sleep habits. Evidently, depressed moods, fatigue, daytime sleepiness, unhappiness, irritations and annoyances decreased. In contrast, motivation, class attendance, and satisfaction amongst the students increased. There were drastic changes on the students´ behaviors, and the Health Center clearly saw this. Certainly, I think that making teens sleep more will make their behaviors change in positive ways. There would be less grumpiness and more happiness. Schools around the world should consider delaying their school starting times, seriously.

WORKS CITED:
"Delayed Scool start."http://topnews.ae/images/Delayed-School-Timings.jpg . Nov. 3, 2010.