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Home : Other Subjects : Psychology Study Guides : Abnormal : Anxiety Disorders : Psychological Etiology of Anxiety Disorders
Psychological Etiology of Anxiety Disorders
One of the most important cognitive factors that may influence the development
of anxiety disorders is the concept of perception of control. Empirical
evidence supports the assertion that people who feel they are more able to
control events in their environments are less likely to develop some type of
anxiety disorder. One experiment involving people with panic disorder, in
particular, performed by Sanderson, Rapee, and Barlow, found that the
individual's illusion of control served as a good predictor of whether or not
the person would experience a panic attack. Another important psychological
paradigm that has been proposed to explain the causes of panic disorders
was proposed by David Clark. According to Clark, panic disorders result from a
gross misinterpretation of bodily sensations. Regardless of whether or not the
trigger stimulus is an external or internal stimulus, the panic attack is
associated with a cognitive misinterpretation of a biological reaction. Support
for Clark's cognitive model of panic disorder comes from laboratory studies
wherein attacks are induced in individuals with panic disorder by increasing the
amount of carbon dioxide in the room or injecting chemical lactate into the
patient, both of which are known to produce such physiological reactions as
lightheadedness and increased heart palpitations. People without panic
disorder, therefore, experience the same autonomic responses as individuals with
the disorder, but do not attribute the same cognitive reasoning. In a type
of self-fulfilling prophecy, then, the thought of the perceived threat
becomes the problem and leads to the onset of the attack.
Attention has also been shown to play a role in the etiology and
maintenance of some anxiety disorders, such as social phobias. Basically,
individuals who are prone to worrying develop complicated cognitive strategies
to cope with and avoid signals of future or anticipated threats. They become
overly sensitive to cues that signal a potential threat and, therefore, although
maladaptive, exist in a state of anxious apprehension that temporarily
relieves psychological discomfort associated with the physiological
symptoms. The problem, however, with attentional processes, is that the
individual learns to focus on the negative associations between the thought and
their emotional response and attempts to suppress the thought instead of relying
on productive coping mechanisms and focusing on the external aspects of the
problem. Obsessive-compulsive disorder, then, for example, could be seen as
the result of a maladaptive process to control, or suppress, unwanted or
threatening thoughts. Individuals prone to OCD, like other normal people,
occasionally have bizarre or abnormal thoughts, but they differ in that they
then tend to overreact. Distressed by their exaggerated reaction, a vicious
cycle begins wherein the OCD individual will attempt to suppress the thought,
but, in a type of rebound effect, their attempt to avoid such thoughts leads to
an obsession with that specific thought. Evidence suggests that a type of
classical conditioning occurs, wherein the
emotional state and the thought the individual is trying to suppress, anxiety
and the forbidden thought, become linked. Operant
conditioning may also be at work in OCD because
when the individual performs the act, their anxiety goes down and they are
therefore more likely to repeat the behavior; a type of negative
reinforcement.
Psychoanalytic theory also provides a
possible explanation of OCD. Psychologists within this group believe
that the potential for developing OCD becomes fixed during the anal
stage of development. Around the age
of two years old, when the id impulse is very
destructive and gains pleasure from destroying things, and especially if parents
are too strict with toilet training, the child develops, at an unconscious
level, rage against the parents and a desire to kill them. This thought is very
frightening and untenable to a person of any age; in order to deal with the
conflict between the id and the ego, the
individual may develop four defense
mechanisms: isolation, displacement,
reaction formation, and undoing, which express themselves in the form of
the OCD paradigm. Individuals who suffer from OCD are therefore trapped in this
stage of development.
Finally, some phobias may be learned by observing and imitating the
behavior of other individuals. Vicarious learning and direct experience have
both been shown to increase the potential for developing negative associations
between stimuli. One experiment, conducted by Mineka and Cook, demonstrated
that rhesus monkeys learn to selectively fear certain stimuli such as snakes by
observing the behavior and reaction of wild monkeys. Yet, this study also
demonstrated that the learning was selective, in that there had to be a possible
evolutionary prepared association of the snake, or crocodile, as relevant to
fear: the behavior was not reproduced for fear-irrelevant stimuli, such as
kittens, which points to a biological basis of modeling.
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