Monday, August 27, 2012

Behavioral Theory (Behaviorism)

Behavioral Theory (Behaviorism)

We practice with human beings in their social environments, so this comment from the founding father of Behaviorism speaks volumes about the causes of human behavior and thought, as well as methods we can employ to assist them in changing those very things that challenge them:
Give me a dozen healthy infants, well-formed, and my own specified world to bring them up in and I'll guarantee to take any one at random and train him to become any type of specialist I might select -- doctor, lawyer, artist, merchant-chief and, yes, even beggar-man and thief, regardless of his talents, penchants, tendencies, abilities, vocations, and race of his ancestors. --John Watson, 1930

Behavioral theory is based on the belief that behaviors can be measured, trained, and changed. This theory of learning is based upon the idea that all behaviors are acquired through conditioning. Conditioning occurs through interaction with the environment. Behaviorists believe that our responses to environmental stimuli shapes our behaviors. There are two major types of conditioning that produce behavior: Operant conditioning and Classical (Pavlovian or Respondent) Conditioning.

Operant conditioning

(AKA instrumental conditioning) A method of learning that occurs through rewards and punishments for behavior. Through operant conditioning, an association is made between a behavior and a consequence for that behavior. Coined by behaviorist B.F. Skinner, he believed that internal thoughts and motivations could not be used to explain behavior. Skinner used the term operant to refer to any "active behavior that operates upon the environment to generate consequences" (1953). In other words, Skinner's theory explained how we acquire the range of learned behaviors we exhibit each and every day (Learning Theory). Examples include: children completing homework to earn a reward from a parent or teacher, or employees finishing projects to receive praise or promotions. Removal of a desirable outcome or the use of punishment can be used to decrease or prevent undesirable behaviors. For example, the loss of recess privileges or additional homework as punishment may lead to a decrease in disruptive behaviors.

Reinforcement

is any event that strengthens or increases the behavior it follows:
    1. Positive reinforcers are favorable outcomes that are presented or added after the behavior, such as praise or a direct reward.
    2. Negative reinforcers involve the removal of an unfavorable outcome after the display of a behavior.

Punishment

on the other hand, is the presentation of an adverse outcome that causes a decrease in the behavior it follows.
    1. Positive punishment, sometimes referred to as punishment by application, involves the presentation of an unfavorable event or outcome in order to weaken the response it follows, such as “time out.”.
    2. Negative punishment, also known as punishment by removal, occurs when an favorable event or outcome is removed after a behavior occurs, such as the denial of recess time.

Classical conditioning

Although operant conditioning plays the largest role in discussions of behavioral mechanisms, classical conditioning (or Pavlovian conditioning or respondent conditioning) is a technique used in behavioral training in which a naturally occurring stimulus is paired with a response, then substituted with different stimulus. Eventually, the new stimulus comes to evoke the response. The two elements are then known as the conditioned stimulus and the conditioned response. Pavlov's experiments, the dog was presented with a stimulus such as a light or a sound, and then food was placed in the dog's mouth. After a few repetitions of this sequence, the light or sound by itself caused the dog to salivate.[19]

The Little Albert Experiment (Classical conditioning by Watson)


    Around the age of nine months, Watson exposed the child to a series of stimuli including a white rat, a rabbit, a monkey, masks and burning newspapers and observed the boy's reactions. The boy initially showed no fear of any of the objects he was shown.
    The next time Albert was exposed the rat, Watson made a loud noise by hitting a metal pipe with a hammer. Naturally, the child began to cry after hearing the loud noise. After repeatedly pairing the white rat with the loud noise, Albert began to cry simply after seeing the rat.
    The Little Albert experiment presents and example of how classical conditioning can be used to condition an emotional response.
    • Neutral Stimulus: The white rat
    • Unconditioned Stimulus: The loud noise
    • Unconditioned Response: Fear
    • Conditioned Stimulus: The white rat
    • Conditioned Response: Fear

    3 comments:

    1. The quote from Behaviorism by John Watson that you provide is incomplete. It actually goes like this,

      "Give me a dozen healthy infants, well-formed, and my own specified world to bring them up in and I'll guarantee to take any one at random and train him to become any type of specialist I might select – doctor, lawyer, artist, merchant-chief and, yes, even beggar-man and thief, regardless of his talents, penchants, tendencies, abilities, vocations, and race of his ancestors. I am going beyond my facts and I admit it, but so have the advocates of the contrary and they have been doing it for many thousands of years." [p. 82]

      The last sentence is often left off to make Watson seem more extreme than he actually was.

      Further, i believe that Skinners take on thoughts and emotions was that they were similar to other,overt behaviors, with the exception that they only have one observer (the individual engaging in them). The implication is that covert behaviors are a function of their consequences in the same way that overt behaviors are.

      For example, if you are stranded on an island by yourself, the consequences of trying to build a boat (how well it floats and can be used to move around on the ocean) would determine the likelihood of repeating a given building style. If a certain method worked, it would likely be repeated. On the other hand, if a method failed, something else would likely be tried.

      This selection by consequences of boat building methods would occur even though only the person doing the building can observe their behaviors. Similarly, the consequences of thoughts and emotions modify their future probability even though they are not publicly available for observation.

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