Psycopathology Flashcards
phobia definition
-A phobia is a mental disorder that is characterised by 3 types of symptoms:
1)persistent fear of a specific stimulus which is an emotional symptom
2)irrational beliefs about the feared stimulus which is a cognitive symptom
3)avoidance of the feared stimulus which is a behavioural symptom
-all 3 of these symptoms need to be present for someone to be diagnosed with a phobia and they have to be about one specific stimulus
types of phobias
social phobia-the fear of being in social situations
agoraphobia-the fear of being in a situation where escape would be difficult
specific phobias-the fear of a specific object or animal
the two process model suggests
-suggests phobias are acquired and maintained by different processes:
1)suggests phobias are acquired through classical conditioning which is when a person develops a phobia of a neutral stimulus if they encounter the NS alongside an unpleasant UCS(unconditional stimulus)
2)suggests phobias are maintained by operant conditioning which is when a person avoids a feared stimulus, the negative feeling of the fear is removed, meaning that this behaviour is reinforced through negative reinforcement. So phobias are maintained by operant conditioning
Little Albert
Watson & Rayner:
-conducted a study of little Albert in 1920 which provided evidence for the first step of the two process model
-they repeatedly presented little Albert with a white rat, followed by a long scary noise
-at first little Albert showed no response to the white rat so it was a NS, but through repeated experience, Albert learned to associate the white rat with the loud noise
-so the rat became a conditioned stimulus
-soon the Albert cried whenever he say the white rat, so he’d acquired a phobia through classical conditioning
support for two process
Barlow & Durands
-they found that 50% of participants could recall a traumatic event which caused their driving phobia
-and out of the participants who recalled a traumatic event, many had not driven since
-this supports the idea that phobias are aquired through classical conditioning
-this also supports the idea that phobias are maintained by operant conditioning because avoidance of the feared stimulus is negatively reinforced
evaluation of the behaviourist explanation of phobias: limitations
-not all phobias are caused by a traumatic event and there may be other factors involved, for instance we may have evolved to have phobias of certain stimuli that were threatening to us in past
-so phobias may also be genetically determined
treatment for phobias: flooding
-flooding involves exposing a patient to their worst fear in one go, then they are encouraged to remain near their feared stimulus until the anxiety has worn off
-flooding works because it prevents patients from avoiding the feared stimulus as when confronted with the feared stimulus, the patient sees that the CS doesn’t lead to the UCS
-so the association between the CS and UCS is extinguished
-as a result, the conditioned stimulus no longer causes a conditioned response
treatment for phobias: systematic desensitisation
- SD is a treatment that involves 3 steps:
1)doctor and patient write a list from the least to the most fearful stimulus, this is called a fear hierarchy
2)patients are taught relaxation techniques to manage anxiety such as deep breathing and muscle relaxation
3)patients would then be exposed to the feared stimulus gradually, making sure they are relaxed at each stage
outline how Systematic desensitisation works to treat phobias
-SD works because it confronts a person with the feared stimulus which prevents avoidance to behaviour
-the patient then learns that the feared stimulus is harmless, so the association between the CS and the UCS is extinguished
-as a result, the CS no longer causes a conditioned response
support for flooding
Kaplan & Tolin
-they found that 65% of patients still showed no symptoms of a specific phobia 4 years after a single sessions of flooding
- this suggests that flooding was defective for treating specific phobias because it removed symptoms in patients for a long time after treatment
support for systematic desensitisation:
Ost:
-Ost found in that 90% of patients treated with SD were much improvised or completely recovered from their phobia 4 years after treatment
-this supports that SD can be effective for treating specific phobias since symptoms were improved a long time after treatment
evaluation for therapies: Systematic desensitisation
strength:
-unlike flooding, it exposes the patient to the feared stimulus gradually, creating less distress for the patient
-therefore SD could be more ethical than flooding
limitations:
-however, it may be less effective at treating social phobias and agoraphobia where cognitive factors are also important
limitations of flooding
-doesn’t always work and can actually strengthen the association between the CS and UCS, causing the patient to exhibit a even stronger conditioned fear response
-flooding may be unethical because it can cause lots of distress to patients, because of this it is inappropriate to use flooding for some groups of patients, for whom it may be too traumatic, such as children
the cognitive approach to depression states that there is 2 types of depressions: major depression
1)major depression is a mental disorder that affects a persons mids and is characterised by 7 main symptoms:
1)low mood
2)loss of pleasure
-these are emotional symptoms
3)irrational negative beliefs
4)difficulty concentrating
-these are cognitive symptoms
5)change in appetite
6)change in sleep patterns
7)social withdrawal
-these are behavioural symptoms
-to be diagnosed with major depression, a person must experience at least 5 symptoms of depression for more than 2 weeks. And at least one of those symptoms must be emotional
the cognitive approach to depression states that there is 2 types of depressions: manic depression/bipolar disorder
2)manic depression is when a person cycles between depressive episodes which are having low moods for at least one week and manic episodes which are having high mood for at least one week
models of depression : ellis ABC model
-according to ellis, when people experience negative effects, the experience can be broken down into 3 steps:
1)activating event occurs
2)people form a belief about the causes of the activating event
3)consequences- when the belief influences behaviours, thoughts and feelings
-according to ellis’ ABC, model when a person with depression experiences a negative activating event, they form irrational negative beliefs about the event and as a consequence of the beliefs, they experience the symptoms of depression
models of depression: becks cognitive triad
-this categories irrational negative beliefs into 3 types which are rather about the self, the world or the future
-negative self schemas cause these irrational negative beliefs, meaning that people form negative expectations about themselves
-beck suggested that people with depression have negative cognitive biases, this means they fixate on negative information which is assimilated into their negative self schema, making the schema even stronger
support for the cognitive approach to depression
Koster et al:
-offers support for the role of negative cognitive biases in depression
-they investigated the attentional abilities of people with major depression
-participants sat infront of a computer and a positive neutral or negative world would flash up on the screen
-then, a square would appear somewhere on the screen and the participants had to press a button as fast as they could to indicate where the square appeared
-the DV was the reaction time to press a button and the IV was whether the participants had major depression or not
-the results found that, after being presented with a negative word, participants with major depression took longer than the control group to indicate where the square had appeared
-but this affect was not observed with positive or neutral words
-and so, the study supports the idea that people with major depression focus on negatives and have a negative cognitive bias
evidence against the cognitive approach to depression
Allay & Abramson
-asked participants with and without depression to estimate how much control they had over a flashing light
-they found that participants with major depression estimated more accurately than the control group
-suggesting that not all people with major depression have irrational beliefs
Mcguffin et al:
-suggested that irrational negative beliefs may not be the only cause of depression
-they found that the concordance rate for depression for MZ twins was 46%, and the concordance rate for depression for DZ twins was 20%
-this indicates that genetic factors contribute to the development of major depression