Psychopathology (P1) Flashcards

(79 cards)

1
Q

Define the term statistical infrequency

Definitions of abnormality (1)

A

Occurs when an individual has a less common characteristic for example being more depressed or less intelligent than most of the population

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2
Q

What is an example of statistical infrequency?

Definitions of abnormality (1)

A

IQ and intellectual disability disorder

  • Normal distribution is that most people will cluster around the average. The higher or lower you go the less people
  • Average IQ is 100
  • 68% of people have a score from 85-115
  • 2% have a score below 70 making these individuals abnormal and likely to be diagnosed with an intellectual disability disorder
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3
Q

Statistical infrequency

What are strengths?

Definitions of abnormailty (1)

A

Real-world application

  • useful
  • Used in clinical practive as a part of formal diagnosis and as a way to assess severity of an individual’s symptoms
  • Example, diagnosis of intellectual disability disorder requires an IQ belpw 70
  • Statistical infrequency used in an assessment tool: Beck Depression Inventory, top 5% of respondents is interpreted as indicating severe depression
  • Value of statistical infrequency criterion is useful in diagnosistic and assesment processes
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4
Q

Statistical infrequency

What are limitations?

Definitions of abnormality ()

A

Unusual characteristics can be positive

  • Infrequent characteristics can be positive as well as negative
  • Would not think of someone abnormal for having a high IQ
  • Would not think of someone with a low depression score on BDI (Beck Depression Inventory) as abnormal
  • It is not sufficient as the sole basis for defining abnormality
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5
Q

Define deviation from social norms

Definitions of abnormality (1)

A

Concerns behaviour that is different from the accepted standards of behaviour in a community or society

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6
Q

How are social norms specific to the culture we live in?

Definitions of abnormality (1)

A
  • Social norms are different for each generation and culture
  • No behaviours that universally breach social norms thus can be considered universally abnormal
  • Homosexuality abnormal (and ilegal) in the past and today in some cultures but in today’s society it is more acceptable and legal
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7
Q

What is an example of deviation from social norms?

Definition of abnormality (1)

A
  • A person with anitsocial personality disorder is impulsive, aggressive, and irresponsible
  • According to DSM-5 one important symptom of antisocial personality disorder is an absence of prosocial internal standards associated with failure to conform to lawful and culturally normative ethical behaviour
  • Social judgement that psychopaths are abnormal because they don’t conform to our moral standards
  • This is observed amongst various cultures
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8
Q

Deviation from social norms

What are strengths?

Definitions of abnormality (1)

A

Real-world application

  • Used in clinical practice
  • Example, by defining characteristics of antisocial personality disorder is the failure to conform to culturally normative ethical behaviour i.e. violating the rights of others
  • Signs of the disorder are all deviations from social norms
  • Diagnosis of schizoptypal personalty disorder where the term ‘strange’ is used to characterise the thinking, behaviour and appearance of peoplle with the disorder
  • Deviation from social norms criterion has value in psychiatry
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9
Q

Deviation from social norms

What are limitations?

Definitions of abnormality (1)

A

Cultural and situational relativism

  • Variability between social norms in different cultures and even different situations
  • A person from one cultural group may label someone from another group as abnormal using their standard rather than the person’s standards
  • Example, experiencing of hearing voices is in the norms of some cultures (as a message from ancestors) but would be seen as abnormal in the UK
  • Within a cultural context social norms differ from one situation to another e.g. decitful behaviour in context of family is less socially acceptable than in corporate deal-making
  • Difficult to judge deviation from social norms across different situations and cultures
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10
Q

Define failure to function adequately

Definitions of abnormailty (2)

A

Occurs when someone is unable to cope with ordinary demands of day-to-day living

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11
Q

When is someone failing to function adequately?

Definitions of abnormailty (2)

A

Rosenham and Seligman proposed signs to determine this

  • When a person no longer conforms to standard interpersonal rules e.g. maintaining eye contact
  • When a person experiences severe personal distress
  • When a person’s behaviour becomes irrational or dangerous to themselves or others
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12
Q

What is an example of failure to function adequately?

Definitions of abnormality (2)

A

Intellectual disability disorder

  • An individual must be failing to function adaquately before a diagnosis would be given
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13
Q

Failure to function adaquately

What are strengths?

Definitions of abnormality (2)

A

Represents a threshold for help

  • Represents sensible threshold for when people need professional help
  • Most of us have symptoms of a mental disorder to some degree at some time
  • 25% of people in the UK will experience a mental health problem in any given year
  • Tends to be at the point we cease to function adequately that people seek preofessional help or noticed and referred help
  • Criterion means that treatment and services can be targeted to those who need them most
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14
Q

Failure to function adaquately

What are limitations?

Definitions of abnormality (2)

A

Discrimination and social control

  • Easy to label non-standard lifestyle choices as abnormal
  • In practice it can be hard to tell when someone is failing to fucntion and when they have chosen to deviate from the norms
  • Those who favour high-risk lesure activities may be classed as a danger to self
  • Those who make unusual choices are at risk of being labelled abnormal and their freedom of choice may be restricted
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15
Q

Define the term deviation from ideal mental health

Definitions of abnormality (2)

A

Occurs when someone does not meet a set criteria for good mental health

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16
Q

What is ideal mental health?

Definitions of abnormality (2)

A

Jahoda’s criteria

  • We have no symptoms or distress
  • We are rational and can perceive ourselves accurately
  • we self-actualise (strive to reach our potential)
  • We can cope with stress
  • We have a realistic view of the world
  • We have good self-esteem and lack guilt
  • We are independent of other people
  • We can successfully work, love and enjoy our leisure
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17
Q

Deviation from ideal mental health

What are strengths?

Definitions of abnormality (2)

A

A comprehensive definition

  • Highly comprehensive
  • Jahoda’s concept of ideaal mental health includes a range of criteria for distinguishing ideal mental health from illness
  • Covers most of the reasons why help with mental health may be sought
  • Means that an individuals mental health can be discussed meaningfully with a range of professionals who might take different theoretical views e.g. humanistic counsellor may focus on self-actualisation
  • Ideal mental health provides a checklist which we can assess ourselves and others
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18
Q
A
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19
Q

Deviation from ideal mental health

What are limitations?

Definitions of abnormality (2)

A

May be culture-bound

  • Different elements are not equally applicable to a range of cultures
  • Jahoda’s criteria for ideal mental health is only in the context of the West
  • Concept of self-actualisation would be dismissed as self-indulgent in much of the world
  • Within western Europe there is variation in the value placed on personal independence e.g. high in Germany
  • What defines success in our working, social and love lives is different in different cultures
  • Difficult to apply concept of ideal mental health from one culture to another
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20
Q

Define the term phobia

Phobias

A

An irrational fear of an object or situation

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21
Q

What are behavioura characteristics of phobias?

Phobias

A
  1. Panic
  2. Avoidance
  3. Endurance

1. Panic
* Panic in response to presence of phobic stimulus
* Panic = crying, screaming, running away etc
* Children may freeze, cling, tantrum

2. Avoidance
* Unless a conscious effort is made they tend to put effort into preventing contact with the phobic stimulus

3. Endurance
* Alternative to avoidance
* Remain in presence of phobic stimulus

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22
Q

What are emotional characteristics of phobias?

Phobias

A
  1. Anxiety
  2. Fear
  3. Emotional response is unreasonable

1. Anxiety
* Phobias classed as anxiety disorders
* Anxiety = unpleasant state of high arousal
* Prevents relaxation and positive emotions
* Can be long-term

2. Fear
* Fear = immediate and extremely unpleasant response when encountering/thinkong of phobic stimulus
* More intense than anxiety but doesn’t last as long

3. Emotional response in unreasonable
* Anxiety or fear is much greater than is normal and disproportionate to any threat posed

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23
Q

What are cognitive characteristics of phobias?

Phobias

A
  1. Selective attention to the phobic stimulus
  2. Irrational beliefs
  3. Cognitive distortions

1. Selective attention to phobic stimulus
* Hard to look away from phobic stimulus
* Keeping attention on a threat gives us the best chance of reacting quicjly

2. Irrational beliefs
* May hold unfounded thoughts in relation to phobic stimuli i.e. cannot be easily explained and lack basis in reality

3. Cognitive distortions
* Perceptions of those with a phobia may be unrealistic

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24
Q

What are behavioural characteristics of depression?

Depression

A
  1. Activity levels
  2. Disruption to sleep and eating behaviour
  3. Aggression and self-harm

1. Activity levels
* Reduced levels of energy making them lethargic
* leading to withdrawel from social life, work etc can be severe (can’t get out of bed)
* opposite effect known as psychomotor agitation (struggle to relax)

2. Disruption to sleep and eating behaviour
* Insomnia (redced sleep)
* hypersomnia (increased need for sleep)
* appetite and eating may increase/decrease leading to weight gain/loss

3. Aggression and slef-harm
* irritable
* Can be verbally or physically abusive
* Physical aggression directed against self (self-harm, suicide attempts)

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25
What are emotional characteristics of depression? | Depression
1. Lowered mood 2. Anger 3. Lowered self-esteem ## Footnote **1. Lowered mood** * more pronouned than in daily experience of feeling lethargic and sad * Often describe themselves as worthless and empty **2. Anger** * Can frequently experience anger/extreme anger * Directed at self or others * Emotion can lead to aggressive or self-harming behaviour **3. Lowered self-esteem** * Emotional experience of how much we like ourselves * Depression = likes themselves less than others * Can be extreme and described as self-loathing
26
What are cognitive characteristics of depression? | Depression
1. Poor concentration 2. Attending to and dwelling on the negative 3. Absolutist thinking ## Footnote **1. Poor concentration** * Unable to stick with a task they usually would * Hard to make decisions they would normally find straightfoward * Intereferes with daily lfie **2. Attending to and dwelling on the negative** * Pay more attention to negative aspects of a situation and ignore the positives * Bias towards recalling unhappy events rather than happy ones **3. Absolutist thinking** * Black and white thinking * When a situation is unfortunate tend to be seen as an absolute disaster
27
Define the term OCD | OCD
Obsessive Compulsive Disorder is a condition characterised by obsessions and/or compulsive behaviour ## Footnote Obsessions = cognitive Compulsions = behavioural
28
What are behavioural characteristics of OCD? | OCD
1. Compulsions are repetitive 2. Compulsions reduce anxiety 3. Avoidance ## Footnote **1. Compulsions are repetitive** * Compelled to repeat a behaviour * Examples = counting, handwashing etc **2. Compulsions reduce anxiety** * 10% of OCD people show compulsive behaviour alone * Compulsive behaviours are performed in an attempt to manage the anxiety produced by obsessions **3. Avoidance** * Avoidance as they attempt to reduce anxiety by staying away from situations that trigger it
29
What are emotional characteristics of OCD? | OCD
1. Anxiety and distress 2. Accompanying depression 3. Guilt and disgust ## Footnote **1. Anxiety and distress** * powerful anxiety accompanies obsessions and compulsions * Obsessive thoughts are unpleasant and increase anxiety * Urge to repeat a behaviour (compulsion) creates anxiety **2. Accompanying depression** * Accompanied by low mood and lack of enjoyment in activities **3. Guilt and disgust** * Irrational guilt e.g. over minor moral issues * Disgust may be direct against something external like dirt or at the self
30
What are cognitive characteristics of OCD? | OCD
1. Obsessive thoughts 2. Cognitive coping strategies 3. Insight into excessive anxiety ## Footnote 1. Obsessive thoughts * 90% of people with OCD the major cognitive feature of their condition is obsessive thoughts * Vary from person to person but always unpleasant 2. Cognitive coping strategies * To deal with obsessions * May help manage anxiety * May distract from everyday tasks * May make the person appear abnormal to others 3. Insight into excessive anxiety * Aware their obsessions and compulsions aren't rational * People with OCD experience catostrophic thoughts about worst case scenarios that may result if their anxieties were justified * Tend to be hypervigilant
31
How does the behavioural approach explain phobias? | Phobias: Behavioural explanation
The two-process model
32
summarise the two-process model | Phobias: Behavioural explanation
* Acquisition by classical conditioning * Maintenance by operant conditioning
33
Explain maintenance by operant conditioning | Phobias: Behavioural explanation
* Operant conditioning takes place when behaviour is reinforced or punished * Reinforcement tends to increase frequency of a behaviour (true for both negative and positive reinforcement) * Negative reinfocement - avoiding a phobic stimulus results in a desirable consequency (avoiding anxiety). Reduction in fear reinforcces the avoidance of behaviour and so the phobia is maintained
34
What are strengths? | Phobias: Behavioural explanation
1. Real-world application 2. Phobia and traumatic experiences ## Footnote 1. Real-world application * Exposure therapies (e.g. systematic desensitisation) * Idea that phobias are maintained by avoidance of the phobic stimulus is important in explaining why people with phobais benefit from being exposed to the phobic stimulus * Once avoidance behaviour is prevented it ceases to be reinforced by experience of anxiety reduction and avoidance declines * Valuable, identifies a means of treating phobias 2. Phobias and traumatic experiences * Little albert study COUNTERPOINT * Not all phobias appear after experiencing a bad experience * Not all frightening experiences lead to phobias * Limited explanation
35
What are limitations | Phobias: Behavioural explanation
* Cognitive aspects of phobias ## Footnote * Doesn't account for cognitive aspects of phobias * Explain behaviour * Phobias the key behaviour is avoidance of the phobic stimulus * However we know that phobias aren't simply avoidance resonses - they also have a significant cognitive component * Does not offer an adequate explanation for phobic cognitions * Doesn't fully explain symptoms of phobias
36
Define systematic desensitisation | The behavioural approach to treating phobias
A behavioural therapy designed to reduce an unwanted response e.g. anxiety. Involves drawing up a hierarchy of anxiety provoking situations related to a person's phobic stimulus, teaching the person to relax and then exposing them to phobic situations. The person works through the hierarchy whilst maintaining relaxation
37
What are strengths of systematic desensitisation? | The behavioural approach to treating phobias
1. Evidence of effectiveness 2. People with learning disabilites ## Footnote 1. Gilroy et al (2003) * Followed up 42 people who had SD for spider phobia in 3 5-minute sessions * At 3 and 33 monthss the SD group were less fearful than a control group treated by relaxation without exposure * SD is likely to be helpful for people with phobias 2. Learning disabilites * Can be used to treat those with learning disabilities * Main alternatives to SD not suitable * Often struggle with cognitive therapies that require a high level of rational thought * Flooding may make them feel confused and distressed * SD is most appropiate for treating those with learning disabilites and phobias
38
What are limitations of systematic desensitisation? | Phobias: Behavioural explanation
Flooding is quicker and cheaper
39
Define flooding | The behavioural approach to treating phobias
A behavioural therapy in which a person with a phobia is exposed to an extreme form of a phobic stimulus in order to reduce anxiety triggered by that stimulus. Takes place across a small number of long therapy sessions
40
How does flooding work? | The behavioural approach to treating phobias
* Stops phobic responses quickly * Without option of avoidance behaviour client learns phobic stimulus is harmless * Process is called extinction * A learned response is extuingished when the conditioned stimulus (dog) is ecountered without the unconditional stimuls (being bitten) resuling in conditioned stimulus no longer producing conditioned response (fear) * Client may achieve relaxation in presence of phobic stimulus due to exhaustion from fear response ## Footnote It is not unethical as it is not done until informed consent is collected from the client
41
What are strengths of flooding? | The behavioural approach to treating phobias
Highly cost-effective ## Footnote * Cost-effective as it is clinically effective and not expensive * Flooding can work in 1 session whereas SD may take 10 sessions for the same results * More can people treated at the same cost with flooding than with other therapies
42
What are limitations of flooding? | The behavioural approach to treating phobias
Traumatic ## Footnote * Highly unpleasant experience * Confronting a phobic stimulus in an extreme form provokes tremendous anxiety * Schumacher et al (2015) found that participants and therapists rated flooding as significantly more stressful than SD * Ethical issues of knowingly causing stress to clients although they obtain informed consent * Traumatic nature meants that attrition (dropout) rates are higher than for SD * Overall therapists may avoid this treatment
43
What 3 things does Beck's approach consist of? | The cognitive approach to explaining depression
* Faulty information processing * Negative self-schema * The negative triad
44
# Beck's negative triad Explain faulty information processing | The cognitive approach to explaining depression
* Depressed people attend to negative aspects of a situation * Ignore positives * Absolutist thinking
45
# Beck's negative triad Explain negative self schema | The cognitive approach to explaining depression
* Schema is a package of ideas and information developed through experience * Act as a mental framework for the interpretation of sensory information * Self-schema is package of information about themselves * If a person has a negative self-chema they interpret all information about themselves negatively
46
Explain the negative triad | The cognitive approach to explaining depression
* Person develops dysfunctional view of themselves because of 3 types of negative thinking that occur automatically 1. Negative view of the world - Creates impression is no hope anywhere 2. Negative view of the future - Thoughts reduce any hopefulness and enhance depression 3. Negative view of the self - Thoughts enhance any existing depressive feeling as they confirm existing emotions of low self-esteem
47
What are strengths of Beck's negative triad? | The cognitive approach to explaining depression
1. Research support 2. Real-world application ## Footnote **1. Clark and Beck (1999)** * Review concluded that not only were these cognitive vulnerabilities more common in depressed people but they preceed the depression **Cohen et al (2019)** * Prospective study * Tracked the development of 473 adolescents regularly measuring cogntive vulnerability * Found that showing cognitive vulnerability predicted later depression * Association between cognitive vulnerability and depression 2 . Applications in screening and treatment of depression * Cohen et al * Concluded that assessing cognitive vulnerability allows psychologists to screen young people identifiying those most at risk of developing depression in the future and monitoring them * Understanding cognitive vulnerability can be applied in CBT * Therapies work by altering the kinds of cognitions that make people vulnerable to depression making them more resilient to negative life events * Understanding of cognitive vulnerability useful in clinical practices
48
What are limitations of Beck's negative triad? | The cognitive approach to explaining depression
A partial explanation ## Footnote * Doesn't explain why some may experience hallucinations or delusions
49
Explan Ellis' ABC model | The cognitive approach to explaining depression
* Activating event - Get depressed when experience negative events and these trigger irrational beliefs * Beliefs - Range of irrational beliefs. Musturbationn (must always achieve perfection), Utopianism (life is always meant to be fair) * Consequences - When an activating event triggers irrational beliefs there are emotional and behavioural consequences
50
What are strengths of Ellis' ABC model? | The cognitive approach to explaining depression
Real-world application ## Footnote * Psychological treatment of depression * Ellis' approach to cognitive therapy is called Rational Emotive Behaviour Therapy * By vigorously arguing with a depressed person the therapist can alter the irrational beliefs that are making them unhappy * Some evidence to support the idea that REBT can change negative beliefs and relieve symptoms of depression (David et al 2018)
51
What are limitations of Ellis' ABC model? | The cognitive approach to explaining depression
Reactive and endogenous depression ## Footnote * Only explains reactive depression and not endogenous * Many cases of depression are not traceable to life events and it is not obvious what leads the person to become depressed at that particular time * ABC model less useful for explaining endogenous depression * ABC model can only explain some cases of depression * Partial explanation
52
Define Cognitive Behaviour Therapy | Cognitive approach to treating depression
A method for treating mental disorders based on cognitive and behavioural techniques. Therapy aims to deal with thinking e.g. challenging negative thoughts. Also includes behavioural techniques such as behavioural activation ## Footnote * Most commonly used for treatment of depression
53
What is the cognitive element of CBT? | Cognitive approach to treating depression
* Begins with an assessment where the client and therapist work together to clarify issues * Jointly identiy goals and put together a plan to achieve them * One of the central tasks is to identify where there might be an irrational thought that will benefit from challenge
54
What is the behaviour element of CBT? | Cognitive approach to treating depression
* Involves working to change negative and irrational thoughts * Put more effective behaviours into place
55
Outline Beck's cognitive therapy | Cognitive approach to treating depression
* Identify automatic thoughts about the negative triad and challenge them * Helps client test the reality of their negative beliefs * Client may be set homework referres to as the client as scientist investigating the reality of their negative beliefs like a scientist * Homework can be used as evidence to challenge irrational negative beliefs
56
Outline Ellis' Rational Emotive Behaviour Therapy | Cognitive approach to treating depression
* ABCDE model * D - Dispute * E - Effect * identify and dispute irrational thoughts * Intended effect is to change the irrational belief so break the link between negative life events and depression * Ellis identified different methods of disputing such as empircal argument (involves disputing whether there is evident to support the negative belief), Logical argument (involves disputing whether the negative thought logically follows from facts)
57
What is behavioural activation? | Cognitive approach to treating depression
* When depressed they tend to increasingly avoid difficult situations and become isolated which worsens/maintains symptoms * Goal of behavioural activation is to work with depressed people to gradually decrease their avoidance and isolation and increase their engagement in activies that have been shown to improve mood e.g. exercise * Aims to reinforce such activity
58
What are strengths? | Cognitive approach to treating depression
Evidence of effectiveness ## Footnote March et al (2007) * Compared CBT to antidepressant drugs and a combination of both when treating 327 participants * After 36 weeks 81% of CBT group, 81% of antidepressant group and 86% of combined group were significantly improved * CBT was just as effective when used on its own and more so when combined with antidepressants * Farily brief therapy (10-12 sessions) so cost-effective * CBT widely seen as first choice of treatment in public healthcare systems
59
What are limitations? | Cognitive approach to treating depression
1. Suitability for diverse clients 2. Relapse rates ## Footnote 1. Suitability * In some cases depression can be so sevre that clients cannot motivate themselves to engage with CBT * May not be able to pay attention to what is happening in a session * Likely hard cognitive work in CBT makes it unsuitable for treating those with lerning disabilites * **Sturmy (2005)** - any form of psychotherapy is not suitable for those with learning disabilites * CBT only suitable for a specific range of people with disabilites COUNTERPOINT * **Lewis and Lewis (2016)** * Their review concluded that CBT was as effective as antidepressant drugs and behavioural therapies for severe depression * **Taylor et al (2008)'s** review concluded that when used appropiately CBT is effective for those with learning disabilities 2. Relapse rates * CBT has high relapse rates * CBT is quite effective but there is concerns over how long benefits last * Relatively few early studies of CBT for depression looking at long-term effectiveness * **Shehzad Ali et al (2017)** assessed depression in 439 clients every month for 12 months following a course of CBT. 42% of clients relapsed in 6 months of ending treatment and 53% within a year * CBT needs to be repeated periodically
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# Genetic explanations Define genetic explanations | The biological approach to explaining OCD
Genes make up chromosones and consist of DNA which codes the physical features of an organism (such as eye colour, height) and psychological features (e.g. mental disorder, intelligence). Genes are transmitted from parents to offspring i.e. inherited
61
# Genetic explanations What are candidate genes? | The biological approach to explaining OCD
* Genes which create vulnerability for OCD * Some of these are involved in regulating the development if the serotonin system * Gene 5HT1-D beta is implicated in the transport of serotonin across synapses
62
# Genetic explanations What is meant by OCD is polygenic? | The biological approach to explaining OCD
* OCD is caused by a combination of genetic variations that together significantly increase vulnerability * Taylor et al analyed findings of previous studies and found that up to 230 different genes may be involved in OCD * Genes include those associated with action of dopamine as well as serotonin both neurotransmitters believed to have a role in regulating mood
63
# Genetic explanations Discuss different types of OCD | The biological approach to explaining OCD
* One group of genes may cause OCD in one person byt a different group of genes may cause OCD in another person * Term to describe this is aetiologically heterogenous meaning that the origins (ertiology) of OCD vary from one person to another (heterogenous) * Some evidence suggest different genetic variations may cause different types of OCD
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# Genetic explanations What are strengths? | The biological approach to explaining OCD
Research support ## Footnote Nestadt et al (2010) * Reviewd twin studies * Found 68% of monozygotic twins shared OCD as oppossed to 31% of dizygotic twins Marini and Stebnicki (2012) * Found that a person with a family member diagnosed with OCD is around 4x more likely to develop it as someone without * Genetic influence on development of OCD is demonstrated
65
# Genetic explanations What are limitations? | The biological approach to explaining OCD
Environmental risk factors ## Footnote * There are environmental risk factors * Strong evidnce for idea that genetic variation can make a person more/less vulnerable to OCD however it seems that environmental risk factors can also trigger or increase the risk of developing OCD * Cromer et al (2007) found over half the OCD clients in their sample had experienced a traumatic event * OCD was also more severe in those with 1+ traumas * Genetic vulnerability only provides partial explanation
66
# Neural explanations What is meant by Neural explanations? | The biological approach to explaining OCD
View that physical and psychological characteristics are determined by the behaviour of the nervous system, in particular the brain as well as individual neurons
67
# Neural explanations Describe the role of serotonin | The biological approach to explaining OCD
* Neurotransmitter serotonin is believed to help regulate mood * Neurotransmitters are responsible for relaying information from one neuron to another * Low levels of serotonin means normal transmission of mood-relevant information doesn't take place aand a person may experience low moods (other mental processes may be affected) * Some cases of OCD may be explained by a reduction in functioning of serotonin system in the brain
68
# Neural explanations Describe decision-making systems | The biological approach to explaining OCD
* Some cases of OCD (especially hoarding disorder) seem to be associated with impaired decision making * May be associated with abnormal functioning of the lateral of the frontal lobes of the brain * Frontal lobes responsbile for logical thinking and making decisions * Parahippocampal gyrus associated with processig unpleasant emotions functions abnormally in OCD
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# Neural explanations What are strengths? | The biological approach to explaining OCD
Research support ## Footnote * Antidepressants that work purely on serotonin are effective in reducing OCD symptoms and this suggests serotonin may be involved in OCD * OCD symptoms form part of condtions that are known to be biological in origin such as degenerative brain disorder, Parkinson's disease which causes muscle tremours and paralysis (Nestadt et al) * If a biological disoder produces OCD symptoms we may assume biological processes underlie OCD * Biological factors may be responsible for OCD
70
# Neural explanations What are limitations? | The biological approach to explaining OCD
No unique nerual system ## Footnote * Serotonin-OCD link may not be unique to OCD * Many people with OCD also experience clinical depression (co-morbidity) * This depression likely involves disruption to the action of serotonin * Could be that serotonin is disrupted in people with OCD as they are also depressed * Serotonin may not be relevant to OCD symptoms
71
Define drug therapy | Biological approach to treating OCD
Treatment involving drugs i.e. chemicals that have a particular effect on the functioning of a body system. In context of psychological disorders such drugs usually affect neurotransmitter levels
72
Explain SSRIs | Biological approach to treating OCD
* Antidepressant * Selective Serotonin Reuptake Inhibitor * Serotonin is released by certain neurons in the brain * Released by presynapic neuron and travels across a synapse * Neurotransmitter chemically conveys the signal from the presynaptic neuron where it is broken down and reused * By preventing reabsorption and breakdwon SSRIs effectively increase levels of serotonin in the synape and continue to stimulate the postsynaptic neruon ## Footnote * Available as capsules or liquid * 3-4 months of daily use for SSRIs h=ti have an impact on symptoms
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What is the typical daily dose of fluoxetine? | Biological approach to treating OCD
20mg ## Footnote * SSRI
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Describe combining SSRIs with other treatments | Biological approach to treating OCD
* Often used alongside Cognitive Behaviour Therapy to treat OCD * Drugs reduce a person's emotional symptoms e.g. feeling anxious or depressed * People with OCD can engage more effectively with the CBT * Occasionally other drugs are prescibed alongside SSRIs ## Footnote * In practice some respond best to CBt whole others benefit more when additionally usind drugs e.g. fluoxetine
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What are alternatives to SSRIs? | Biological approach to treating OCD
* Tricylics * SNRIs
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Explain Tricyclics | Biological approach to treating OCD
* Older type of antidepressant * Example, clomipramine * Acts on avrious systems including serotonin system where it has same effect as SSRIs * Clomipramine has more severe side-effects than SSRIS * Genuinely kept in reserve for those who don't respond to SSRIs
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Explain SNRIs | Biological approach to treating OCD
* Serotonin-Noradrenaline Reuptake Inhibitors * More recently used to treat OCD * Reserve for those who don't respond to SSRIs * SNRIs increase levels of serotonin as wel as noradrenaline
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What are strengths? | Biological approach to treating OCD
1. Evidence of effectiveness 2. Cost-effective and non-disruptive ## Footnote 1. Soomro et al (2009) * Reviewed 17 studies that compared SSRIs to placebos in the treatment of OCD * All studies showed significantly better outcomes for SSRIs than for placebo conditions * Typically symptoms reduce for around 70% of people taking SSRIs * Remaining 30% most can be helped by other alternative drugs or combinations of drugs and psychological therapies * Drugs appear to be helpful for most people with OCD COUNTERPOINT * Evidence suggests that even if drug treatments are helpful for most people with OCD they may not be the most effective treatments available * Skapinakis et al (2016) carried out a systematic review of outcome studies and concluded both cognitive and behavioural (exposure) therapies were more effective than SSRIs in treatment of OCD 2. Cost-effective and non-disruptive * Drug treatments in general are cheap compared to psychological treatments became many thousands of tablets or liquid doses can be manufactured in the time it takes to conduct a session of psychological therapy * Using drugs is good value for public health systems and is a good use of limited funds * Non-disruptive to people's lives as psychological therapy involves time spent in sessions
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What are limitations? | Biological approach to treating OCD
Serious side-effects ## Footnote * Drugs can have potentially serious side-effects * A small minority will get no benefit * Some may experience side-effects e.g. indigestion, blurred vision * Usually temporary * Can be distressing for minority that are long-lasting * For those taking tricyclic clomipramine side effects are more common and serious. More than 1 in 10 people experience weight gain. 1 in 100 become more aggressive and have heart problems * Some have reduced quality of life as a result of taking drugs * May stop taking altogether reducing effectiveness