Addiction Flashcards
Define what an addiction is
A disorder in which an individual consumes a substance eg. nicotine or engages in a particular behaviour eg. gambling, that is pleasurable but eventually becomes compulsive with harmful consequences
What is Physiological Dependence?
The mental and emotional compulsion to keep taking a substance as the individual believes that they cannot cope with work and social life without a particular drug eg. alcohol/nicotine or behaviour eg. gambling.
It may increase their pleasure or lessen their discomfort.
Absence of the drug/ behaviour causes individual to feel anxious or irritable and this leads to a craving for the substance
What is Physical Dependence?
The state of the body that occurs when withdrawal syndrome is produced due to stopping the substance use/ behaviour eg. nausea, headaches and shaking
What is Withdrawal Syndrome?
- collection of physiological and physical symptoms an individual experiences when they no longer have the substance in their system/ engaged in a particular behaviour
- withdrawal syndrome includes low mood, feeling nauseous, achy, in pain or experiencing tremors
- experiencing withdrawal is very unpleasant so continuing to take substance or engage in behaviour is partly to avoid the withdrawal symptoms
- seriousness of withdrawal syndrome can depend on:
Substance used/type of behaviour
Amount of substance consumed
Drug use/ behaviour pattern
Define Tolerance
Arises when a substance is taken/ behaviour is maintained over long period of time and due to the repeated exposure, response to substance/behaviour is reduced
Individual needs greater doses to feel same physical and physiological effects
What is cellular tolerance?
Takes place when brain neurons adapt in response to higher levels of a substance
What is Behavioural tolerance?
when a person’s behaviour is less affected by a substance so they can complete daily activities while under the influence
What is genetic vulnerability?
Some people inherit a genetic predisposition to addiction
Genetic vulnerability is explained as an interaction between genes and environmental factors as an individual will not become addicted unless they are exposed to a substance or opportunity
One reason genetic vulnerability can occur is Metabolism. Explain this
Rate of metabolism is inherited through genes
Some individuals metabolise addictive substances faster than others
Making it easier for them to become addicted as they may need more to have the same effects, leading to overuse and addiction
Another reason genetic vulnerability can occur is the effect of D2 receptors. Explain this in terms of addiction.
• D2 receptors are responsible for communicating with the neurotransmitter dopamine which is involved in feelings of pleasure and reward
• Number of D2 receptors an individual has is determined by genetics
• Having low levels of D2 receptors is associated with addiction as this leads to problems experiencing pleasure from everyday activities ie. chocolate
• Therefore, they turn to more addictive substances such as nicotine to experience some feelings of pleasure and compensate for their deficiency, leading to addiction
AO3 for Genetic Vulnerability
Kendler et al
• used data from National Swedish Adoption Study
• looked at adults who were adopted as children and had at least one person with an addiction in their biological family
• these children had significantly greater risk of developing an addiction compared to adopted individuals with no addicted biological parent
• this gives validity to genetic vulnerability as a risk factor in addiction
Explain Stress as a risk factor in addiction
• People who experience stress may turn to addictive substances or behaviour as a form of self medication for stress
• Periods of chronic, long lasting stress and traumatic life events in childhood have been linked with increased risk of developing an addiction
Anderson and Teicher
- found early experiences of severe stress have damaging effects on a young brain during sensitive period of development and can create vulnerability to later stress
- further stressful experiences in later life could trigger the vulnerability and make it more likely individual will self medicate with substances or behavioural addictions
AO3 for stress
Based on correlational research
Can’t establish cause and effect
Addiction may cause stress (through loss of money, lack of sleep, effects on job) rather than stress causing addiction
Lacks internal validity
Explain personality as a risk factor in addiction.
• Agree no such thing as “addictive personality” however, certain traits have been linked to increased likelihood of addiction
• suggested that antisocial personality disorder leads to high vulnerability to addiction
• Clodinger proposed 3 innate dimensions associated with addiction, in particular drug and alcohol abuse
• These are measured through a questionnaire
-Novelty seeking = tendency to get intensely excited by new stimuli and thus continuously seek new, more extreme experiences
- Inhibited Harm Avoidance = lack of inhibitions, worry and fear
- Increased Reward Dependency = tendency to respond more to rewards eg. social approval
AO3 for Personality
Schneider et al
Found novelty seeking was the trait most associated with increased involvement with cannabis, alcohol and cocaine.
Further, research found a positive correlation between novelty seeking and relapse rates for several drugs of abuse among addicts
Gives validity to theory that high novelty seeking personality does increase vulnerability to addiction
However this may suggest that novelty seeking is more important in explaining characteristics of addiction than the other two dimensions
Explain Family Influences as a risk factor in addiction.
Perceived Parental Approval
• If adolescent believes their parents show positive attitudes towards a particular addictive substance/ behaviour then they will be more vulnerable to developing an addiction themselves
Livingstone et al found that final year high school students who were allowed by parents to drink alcohol at home were significantly more likely to drink excessively at college the following year
• Adolescents who believe parents have little interest in monitoring their behaviour are significantly more likely to develop an addiction
• Exposure within family life to a substance/behaviour creates risk of developing addiction
• Social learning theory = individual observes a family member (role model) engaging in addictive behaviour and imitates this behaviour as they identify with them and want to be like them
AO3 for Family Influences
Madras et al
•studied families with adolescents where parents used cannabis
• found strong positive correlation between parents use of cannabis and adolescents use of cannabis, alcohol, nicotine and opioids
• show that adolescents perceived that parents were accepting of drug use so went on to use drugs themselves
• and may have observed parents using cannabis and modelled this behaviour
Explain Peers as a risk factor in addiction
• Some psychologist argue peers act as a gateway to addictive behaviour
•O’Connell et all suggest that adolescents are at risk of developing an alcohol addiction due to the influence of their peers because of 3 major elements
- Attitudes and Norms to drinking alcohol
- Opportunities to drink alcohol
- Individual’s perception = overestimate how much peers drink so drink more to keep up with them
AO3 for Peers
Correlational research
Can’t establish cause and effect
Addiction may cause individual to seek out peers who share same addictive behaviour rather than peers and norms making them engage in addictive behaviour
Lowers internal validity
Explanations for Nicotine addiction
1) Nicotine is inhaled and reaches nicotine receptors in the brain in less than 10 seconds
2) Triggers neurones in the ventral tegmental area to release dopamine
3) Dopamine travels down reward pathway called mesolimbic pathway
4) Dopamine stimulates D2 receptors in the nucleus accumbens which causes pleasure/ euphoria. Thus motivating the persian to want to smoke again, start of addictive behaviour
5) Dopamine also travels down a second reward pathway called mesocortical pathway
6) Dopamine stimulates the prefrontal cortex which makes the person pay attention to the smoking and everything associated with it so that it can be repeated
Cellular changes in nicotine addiction
Upregulation
• When a person hasn’t smoked for a period of time, nicotine receptors become available/ sensitive so they experience withdrawal
• There is an increase in the number of nicotine receptors so more nicotine is needed to feel the same effects (tolerance)
Downregulation
• D2 receptors in the nucleus accumbens become less sensitive and reduce in numbers
• This means they don’t feel the same buzz from smoking so more nicotine is needed to feel a buzz (tolerance)
AO3 for Brain Neurochemistry in Nicotine addiction
Mc Evoy
studied smoking behaviour in ppl with Schizophrenia who were taking a drug (Haloperidol)
This drug is a dopamine antagonist by blocking dopamine receptors, lowering level of dopamine activity in the brain
Found that ppl taking the drug showed significant increase in smoking
However, sample bias as has Schizophrenia, may not be same for neurotypical so can’t generalise findings on low dopamine activity and smoking behaviour on target population of smokers without Schizophrenia. Limiting research.
Explain Learning theory in smoking behaviour
• Smoking is a learnt behaviour through operant conditioning
• explained by positive reinforcement
• Individual is rewarded with euphoria when they inhale nicotine due to its impact on dopamine system in brain’s reward pathway
• therefore, smoke again to get same reward of euphoria
• negative reinforcement can explain why an individual would continue to smoke (maintain addiction)
• Cessation of nicotine leads to appearance of withdrawal syndrome which has unpleasant symptoms such as disturbed sleep, agitation and poor concentration
• these symptoms make it difficult for smoker to abstain for long so individual would continue to smoke to avoid unpleasant symptoms
Explain Cue Reactivity
• Based on Classical conditioning
• When an individual smokes, there are environmental stimuli present alongside the cigarette
• eg. holding a drink, certain friends, pubs, relaxing on sofa after evening meal
• Individual associates smoking nicotine (UCS) with these environmental stimuli (NS)
• After conditioning, the environmental stimuli becomes CS and acts as cue (trigger) to smoking leading to craving
• This explains why ppl maintain smoking behaviour as the cues lead to cravings so the person smokes to reduce psychological withdrawal
• Also explains relapse as many ppl quit smoking but when faced with cues, crave a cigarette and smoke again