Skinner Box – Operant Conditioning

Operant conditioning has been used constantly to have animals of all types perform interesting actions on command. We have seen everything from pigeons spinning in circles to bears playing the trumpet. Teaching these animas to perform actions can be difficult but there is a rather structured process to teaching these animals. There are two main components to teaching these animals and one is shaping which is the process of reinforcing behaviors that are close to the desired action. The other component would be the use of reinforcement to encourage these desired actions. Another thing that helps train these animals is what is called a Skinner box. These boxes isolate animals in an attempt to contain their focus and concentration on certain a task. Skinner boxes were used in one of the examples above with the pigeon.

Now that we have a basic understanding of the ability and process behind operant conditioning I wanted to talk about one of the most impressive cases in my opinion which I learned about in my high school psychology class. Our teacher told us one day that someone named B.F. Skinner (same skinner that made the skinner box) got funding form the United States government. The interesting thing is that the funding was to research whether or not operant conditioning could be used to guide missiles. The process could be simplified to there being a dot (target) in the middle of the screen and the bird would peck to the sides of the dot to keep it in the middle. After they successfully kept the dot in the middle their behavior would be reinforced with food. Slowly but surely these birds were missile guiding machines. Although this was never actually used in real life it is an excellent example on how successful operant conditioning can be.

 

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.

 

Top-Down Processing and Perception

In class we discussed how attention and what you look at will effect the way you see things. This was illustrated through multiple examples like the monkey business video where a monkey walked through people passing a ball and about half of the people never see the monkey. Another example was a blinking picture that overtime changed to a completely different picture and almost everyone thought there were some changes but didn’t notice the whole image change.

I wanted to explore these concepts more and remembered a time in my high school class when we looked at examples which illustrated top down processing and how we can run into errors associated with them.

This is an example of The Necker Cube which shows two different perspectives when focused you focus on different areas. The way people see the image initially is based on our previous experiences. Below I have provided a few more examples of these double image images.

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In the above example the white will make a vase and the black will show two faces.

 

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In the above example there is a bunny with the ears facing to the left or you will see a duck with its beak facing to the left

 

All of these images get processed in our brian by a certain way. There are three steps which our brain goes through. The first step is for us to take in all of the information we can get from the image we are presented with. This is what is called the sensory data. The next step is for our brain to recall previous experiences and memories which can be related to the sensory data. The final step is the brain will make a guess or inference based on what it learned above.

There is another process that the brain uses which is called bottom-up processing. Bottom up processing takes sensory information and then has it build upon itself until the fill picture or any other type of information is complete.