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Old 04-25-2013, 10:39 AM   #1
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Default Systematic desensitization

Systematic Desensitization (also known as graduated exposure therapy or counterconditioning) is a type of behavior therapy used in the field of psychology to help effectively overcome phobias and other anxiety disorders. More specifically, it is a type of Pavlovian therapy developed by South African psychiatrist, Joseph Wolpe. In the 1950s, Wolpe discovered that the cats of Wits University could overcome their fears through gradual and systematic exposure.[1] The process of systematic desensitization occurs in three steps. The first step of systematic desensitization is the creation of an anxiety inducing stimulus hierarchy. The second step is the learning of relaxation or coping techniques. Once the individual has been taught these skills, he or she must use them in the third step to react towards and overcome situations in the established hierarchy of fears. The goal of this process is for the individual to learn how to cope with, and overcome the fear in each step of the hierarchy.





Contents
[hide] 1 Three steps of desensitization
2 Example
3 Systematic desensitization and specific phobias
4 History of systematic desensitization
5 Current use of systematic desensitization
6 Systematic desensitization and test anxiety
7 Systematic desensitization and substance abuse
8 See also
9 References
10 External links


[edit] Three steps of desensitization

There are three main steps that Wolpe identified to successfully desensitize an individual.
1.Establish anxiety stimulus hierarchy. The individual must first identify the items that are causing anxiety. Each item that causes anxiety is given a subjective ranking on the severity of induced anxiety. If the individual is experiencing great anxiety to many different triggers, each item is dealt with separately. For each trigger or stimuli, a list is created to rank the events from least anxiety provoking to the greatest anxiety provoking.
2.Learn coping mechanism or incompatible response. Relaxation training, such as meditation, is one type of coping strategy. Wolpe taught his patients relaxation responses because it is not possible to be both relaxed and anxious at the same time. In this method, patients practice tensing and relaxing different parts of the body until the patient reaches a state of serenity.[2] This is necessary because it provides the patient with a means of controlling his fear, rather than letting it increase to intolerable levels. Usually only a few sessions are needed for a patient to learn the appropriate coping mechanisms. Additional coping strategies include anti-anxiety medicine and breathing exercises. Another means of relaxation is cognitive reappraisal of imagined outcomes. The therapist might encourage subjects to examine what they imagine happening when exposed to the anxiety-inducing stimulus and allowing for the client to replace the imagined catastrophic situation with imagined positive outcomes.
3.Connect the stimulus to the incompatible response or coping method through counter conditioning. In this step the client completely relaxes and is then is presented with the lowest item that was placed on their hierarchy of severity of anxiety. When the client has reached a state of serenity again after being presented with the first stimuli, the second stimuli that should present a higher level of anxiety is presented. Again, the individual practices the coping strategies learned. This activity is completed until all items of the hierarchy of severity of anxiety is completed without inducing anxiety in the client. If at any time during the exercise the coping mechanisms fail or the client fails to complete the coping mechanism due to severe anxiety, the exercise is stopped. Once the individual is calm, the last stimuli that was presented without inducing anxiety is presented again and the exercise is continued.[3]

[edit] Example

A client may approach a therapist due to their great phobia of snakes. The following example shows how the therapist would help the client using the three steps of systematic sensitization
1.Establish anxiety stimulus hierarchy. A therapist may begin by asking the patient to develop a fear hierarchy. This fear hierarchy would list the relative unpleasantness of various levels of exposure to a snake. For example, seeing a picture of a snake might elicit a low fear rating, compared to the imagery of live snakes crawling on the individual---the latter scenario becoming highest on the fear hierarchy.
2.Learn coping mechanism or incompatible response. The therapist would work with the client to learn appropriate coping and relaxation techniques such as meditation and deep muscle relaxation responses.
3.Connect the stimulus to the incompatible response or coping method. The client would be presented with increasingly unpleasant levels of the feared stimuli, from lowest to highest---while utilizing the deep relaxation techniques (i.e. progressive muscle relaxation) previously learned. The imagined stimuli to help with a phobia of snakes may include: a picture of a snake; a small snake in a nearby room; a snake in full view; touching of the snake, etc. At each step in the imagined progression, the patient is desensitized to the phobia through exposure to the stimulus while in a state of relaxation. As the fear hierarchy is unlearned, anxiety gradually becomes extinguished.

[edit] Systematic desensitization and specific phobias

Specific phobias are one class of mental illness often treated via systematic desensitization. When persons experience such phobias (for example fears of heights, dogs, snakes, closed spaces, etc.), they tend to avoid the feared stimuli; this avoidance, in turn, can temporarily reduce anxiety but is not necessarily an adaptive way of coping with it. In this regard, patients' avoidance behaviors can become reinforced -a concept defined by the tenets of operant conditioning. The goal of systematic desensitization thus, is to overcome avoidance by gradually exposing patients to the phobic stimulus, until that stimulus can be tolerated.[4] Wolpe found that systematic desensitization was successful 90% of the time when treating phobias.[5] In classical and operant conditioning terms the elicitation of the fear response is extinguished to the stimulus (or class of stimuli).

[edit] History of systematic desensitization

Joseph Wolpe developed the process of systematic desensitization in the early 1950s. Wolpe studied the works that Ivan Pavlov did on artificial neuroses and the research done on elimination of children's fears by Watson and Jones. In 1958, Wolpe did a series of experiments on the artificial induction of neurotic disturbance in cats. He found that gradually deconditioning the neurotic animals was the best way to treat them of their neurotic disturbances. Wolpe deconditioned the neurotic cats through different feeding environments. Wolpe knew that this treatment of feeding would not generalize to humans and he instead substituted relaxation as a treatment to relieve the anxiety symptoms.[6]

Wolpe found that if he presented a client with the actual anxiety inducing stimulus, the relaxation techniques did not work. It was difficult to bring all of the objects into his office because not all anxiety inducing stimuli are physical objects, but instead are concepts. Wolpe instead began to have his clients imagine the anxiety inducing stimulus or look at pictures of the anxiety inducing stimulus, much like the process that is done today.[7]

[edit] Current use of systematic desensitization

Desensitization is widely known as one of the most effective therapy techniques. In recent decades, systematic desensitization has been used less and less as a treatment of choice for anxiety disorders. Since 1970 academic research on systematic desensitization has declined, and the current focus has been on other therapies. In addition, survey research that has been done has shown that the number of clinicians using systematic desensitization has also declined since 1980. Those clinicians that continue to regularly use systematic desensitization were trained before 1986. It is believed that the decrease of systematic desensitization by practicing psychologist is due to the increase in other techniques such as flooding, implosive therapy, and participant modeling.[8]

[edit] Systematic desensitization and test anxiety

Many intelligent and conscientious children and college students with great academic abilities suffer from test anxiety. Children can suffer from low self-esteem and stress induced symptoms as a result of test anxiety.[9] The principles of systematic desensitization can be used by children to help reduce their test anxiety. Children can practice the muscle relaxation techniques by tensing and relaxing different muscle groups. With older children and college students, an explanation of desensitization can help to increase the effectiveness of the process. After these students learn the relaxation techniques, they can create an anxiety inducing hierarchy. For test anxiety these items could include not understanding directions, finishing on time or marking the answers properly. Teachers, school counselors or school psychologists could instruct children on the methods of systematic desensitization.[10]

[edit] Systematic desensitization and substance abuse

Systematic desensitization can also be used successfully to treat drug abuse. Because systematic desensitization was proven to work successfully for those with phobias, the idea to test the treatment on drug addicts was attempted. The patient's fear of withdrawal symptoms was suggested by to be similar to that of a drug addict and was proven successful for hospitalized patients. The controlled setting of the hospital ensured that patients continued with therapy as opposed to outpatient therapy programs.[11]

Later studies focused on the use of systematic desensitization in outpatient drug therapy. In a 1974 case study of a 21 year old heroin addict, Panyard and Wolf concluded that systematic desensitization is possible in a outpatient setting. However, the initial task of convincing the patient to learn the relaxation techniques can be difficult. The relaxation techniques are easily learned in three or four sessions but it is difficult for a patient to commit to initial training. In addition, Panyard and Wolf suggested that the reluctance to attend therapy session might stem from their fear of the therapy process.[12]
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