Approach in psychology Flashcards
Origins of Psychology: Wilhelm Wundt + introspection
− First ‘psychologist’
− Used introspection (The process of “looking inward” and examining one’s self and one’s own actions in order to gain insight) in controlled environments, he provided patients with e.g. a visual image and asked them to provide a description of their inner processes
− Compare patient’s responses to generate theories
− Eval: Unreliable – based primarily on no observable responses + results were not reproducible
Origins of Psychology: The emergence of psychology as a science
− Methods uses to conduct research tend to be empirical (research conducted, and conclusions reached, by means of observation and documentation)
− Knowledge and understanding comes from observation and experience alone, should be based on evidence
− Key assumptions of the scientific approach:
→ All behavior is caused by something
→ As behavior is caused, once we know the cause, we should be able to predict behavior in that situation
− The scientific method:
→ Objective –
→ Systematic –
→ Replicable –
− Eval:
→ reliable – knowledge acquired more than just the passive acceptance of facts
→ reduce ecological validity – using controlled environments means that the tests and research are artificial and not similar to the real world, reduce ability to generalise
Behaviourism/learning approaches: Key approaches
− All behaviour is learnt and we learn through experience
− Study observable behaviour – not interested in thought processes
− We are born as ‘blank slates’
Behaviourism/learning approaches: Classical conditioning
− Unconditioned stimulus (UCS) – something that unconditionally, naturally and automatically triggers a response
− Unconditioned response (UCR) – the unlearned response that occurs naturally in reaction to the UCS
− Neutral stimulus (NS) – a stimulus that does not produce an automatic response
− Conditioned stimulus (CS) – a stimulus that was previously a neutral stimulus and after having been associated with the UCS eventually come to trigger a CR (same as the UCR to the UCS)
− Conditioned response (CR) – the learned response to the previously neutral, now conditioned, stimulus
Behaviourism/learning approaches: CC - Pavlov
− Pavlov was investigating the workings of the digestive system
− Procedure: he had a dog harnessed to a bench with a tube coming out if its mouth and going into a jar, Pavlov realised that the dog would salivate more when it heard the sound of the door
− Findings:
→ Stimulus generalisation – he discovered that once an animal has been conditioned, they will also respond to other stimuli that are similar to the CS
→ Timing (NS and UCS association) – if the NS cannot be used to predict the UCS (e.g. time interval in between = too large) then conditioning doesn’t take place
→ Extinction – the CR doesn’t become permanently established, after a few presentations of the CS in the absence of the UCS it loses its ability to produce the CR
→ Spontaneous recovery – following the extinction, if the CS and UCS are paired again the link is made much more quickly
Behaviourism/learning approaches: Operant conditioning
− Reinforcement – anything that strengthens a response and increases the likelihood it will occur again in the future
− Positive reinforcement – favourable event or outcome presented after the behaviour, the behaviour is strengthened by the addition of something
− Negative reinforcement – a response is strengthened by the removal of something unpleasant
− Positive punishment – pentation of an unfavourable event or outcome following an undesirable behaviour, the behaviour is weakened and decreased
− Negative punishment – the removal of a desired item or outcome, with the result that the behaviour is less likely to occur again
Behaviourism/learning approaches: OC - Skinner
− Procedure: skinners box contained a response lever which could prompt the release of a pellet down a chute, loudspeakers and lights acted as visual cues and the floor was metal so that an electric shock could be administered. Rats were placed in skinners box.
→ Pellet = positive reinforcement
→ Electrified floor = positive punishment
→ Avoidance of the floor = negative reinforcement
− Findings: as soon as a rat learned that it would get a pellet when pressing the lever, it would keep doing so – behaviour was positively reinforced. Rat learns it will be rewarded with a pellet every time it presses the lever – continuous reinforcement
Evaluation of the behaviourist approach: CC led to the treatment of phobias :)
P: classical conditioning has led to the treatment of anxiety and phobias – systematic desensitisation (SD)
E: SD relies of the same principles as CC + aims to replace original association between object + fear to the association of relaxation
C: principles of the approach have led to a therapy effective and capable of improving people’s lives
Evaluation of the behaviourist approach: Reliance on scientific methods :)
P: reliance of scientific method(s)
E: experiments use controlled conditions + objective methods – cause and effect relationship can be established as researcher can understand cause of behaviour
C: therapy can be said to be supported by sound evidence
Evaluation of the behaviourist approach: Doesn’t acknowledge thoughts :(
P: behaviourist approach doesn’t acknowledge the role of thoughts in out behaviour
E: most psychologists acknowledge thoughts so play a part in our behaviour but behaviourists are only concerned with observable phenomena
C: theory = too simplistic
Evaluation of the behaviourist approach: Reliance on animal studies
P: reliance on experiments using non-human animals
E: skinner + Pavlov used rats/dogs in to test their theories
C: human learning may be a more complex process comparatively meaning evidence may not apply to humans
Behaviourism/learning approaches: Social learning theory
− Modelling – learning vicariously by observation and imitation
− Imitation – to copy a models behaviour with the hope of receiving the same consequences
− Identification – the subject assimilates an aspect, property or attribute of the other and is transformed wholly or partly by the model the other provides
− Vicarious reinforcement – tendency to repeat or duplicate behaviours others are rewarded for
− The role of the mediational process – occurs between observing the behaviour and imitating it or not, there are 4 mediational processes: attention, retention, reproduction + motivation
Behaviourism/learning approaches: SLT Bandura
− Procedures:
→ 36 male + 36 female participants, average age 4 years
→ children observed models behaviour in a toy room containing some aggressive toys, e.g. mallet + dart gun, some non-aggressive, e.g. dolls, + a 3ft bobo doll
→ two conditions (+ 1 control): non aggressive – the model played with the toys in a quiet manner + aggressive condition – aggressive towards the bobo doll, laying it on its side + sitting + punching it, striking it with a mallet and shouting abuse etc.
→ children taken to a similar toy room and observed and behaviours recorded for 20mins using the measures: imitation of physical aggression, imitation of verbal aggression, imitation of non-aggressive verbal responses + non imitative physical + verbal aggression
− Findings: children who had observed aggressive behaviour acted more aggressively + imitation was seen in both specific acts + in general levels of their behaviour. Boys acted more aggressively than girls + there was a greater level of imitation between same sex models (identification)
− Conclusion: learning can take place in the absence of either classical or operant conditioning – the children imitated the behaviour in the absence of any reward
Behaviourism/learning approaches: SLT Bandura evaluation
→ :( short term effects – doesn’t show whether the behaviours were retained
→ :( ethical issues – testing on children who can’t properly consent + teaching them violence
The biological approach key assumptions
− Views humans as biological organisms
− Explains human behaviour in term of physical factors:
→ Genetics – behaviour is inherited, recognising the process of evolution
→ The central nervous system (brain + spinal cord) – explains behaviour in terms of the physical structure + functioning of the brain
→ Biochemistry – chemicals found in the brain (neurotransmitters) + body (hormones) are believed to influence reactions to the environment
The influences of genes on behaviour (the biological approach)
− Hereditary – something that is passes on through generations, hereditability – the proportion of the characteristics that is seen as genetic
− BA emphasises the importance of genetic inheritance e.g. geneticists assume that IQ is partially genetically determined
− Genotype – the genetic code that is written into out DNA, it can determine physical factors e.g. hair + eye colour
− Phenotype – the observable characteristics of an individual which may reflect the interaction between the genetic code (genotype) and the environment
− Individuals are born with 23 pairs of chromosomes = our genotype + provide the genetic basis for our development + behaviour
− Often research into the effect for genes uses twins
→ MZ twins – have the same gene (one egg splits in two)
→ DZ twins – share only 50% of their genes (two eggs fertilised by two sperm)
→ Twins are compared to see what characteristic are more genetic than others i.e. if a characteristic is genetic MZ twins will both have it
→ Concordance rate – the presents of the same trait in both members of twins
The influence of biological structures on behaviour (the biological approach)
− Neurons – nerve cell that transfers information between the nervous system, vary according to their job: sensory, relay + motor neurons
− The nervous system
→ Central nervous system (CNS) – includes the brain + spinal cord
→ Peripheral nervous system (PNS) – supports the CNS, consists of the somatic + autonomic nervous system
− The brain
→ Cerebrum – largest part of the brain, split into two hemispheres + hemisphere divided into 4 lobes
→ Cerebral cortex – surface of the cerebrum, responsible for ‘higher order’ functions
The influence of neurochemistry on behaviour (the biological approach)
− The study of chemicals + natural processes with the nervous system
− Neurotransmitters – chemical messengers within the cerebral brain fluid
→ Excitatory neurotransmitters – trigger nerve impulses in the receiving neuron + stimulate the brain into action e.g. dopamine
→ Inhibitory neurotransmitters – inhibit nerve impulses to calm the brain + balance mood e.g. serotonin
− Hormones - A chemical substance produced in the body that controls and regulates the activity of certain cells or organs, released from endocrine glands + travel through the blood stream to their ‘target cells’
Evaluation of the biological approach: Scientific methods :)
P: uses scientific methods + objective evidence
E: using measures which are largely objective + precise e.g. brain scanning (PET, fMRI etc.) + measuring biochemical levels, shows biological causes can be linked to psychological symptoms e.g. dopamine levels in schizophrenia
C: experimental methods take place in highly controlled environments, enabling other research’s to replicate research studies under the same conditions to check the reliability of the findings
Evaluation of the biological approach: Practical applications :)
P: it has practical applications
E: drugs could be developed that might help to address the symptoms of psychological disorders e.g. antidepressants
C: therefore can greatly improve people’s lives
Evaluation of the biological approach: Reductionist :(
P: reductionist – some of the explanations are too simplistic
E: they reduce human behaviour down into its smallest component parts e.g. genes + hormones
C: fails to recognise the complexity of hum behaviour + the role of other factors in behaviour e.g. upbringing, cognitive, cultural + emotional factors
Evaluation of the biological approach: Doesn’t blame people for their psychological problems :)
P: doesn’t blame people for their psychological problems
E: as abnormalities are due to inherited genetics
C: leads to more humane treatment of the mentally ill
Evaluation of the biological approach: Cause + effect :(
P: problems with cause + effect
E: even if we know which part of the brain is active + how much activity there is we can never be absolutely sure how brain activity relates to behaviour
C: does brain activity cause behaviour or does the behaviour cause brain activity
The cognitive approach key assumptions
− Refer to thought processes to explain behaviour
− Compares the mind to a computer + uses an information processing model
− Thought processes should be studied scientifically
− Studies mental processes e.g. memory, perception, thinking + language
− Cannot directly see processes e.g. thinking but we can infer based on behaviour
− Information received from our 4 senses are processed by the brain + this processing directs the way we behave
The study of internal metal processes (the cognitive approach)
− CA studies information processing i.e. the way we deal with information from our environment or experiences
− Thought processes cannot be studied directly because it is non observable, therefore they must be studied indirectly + inferences are made about what cognitive processes have occurred based on the result behaviour
The role of schemas (the cognitive approach)
− Schema – a collection of ideas about a person or situation form through experience which helps an individual to understand + predict the world around them
− Allow us to take shortcuts in interpreting they vast amount of information that is available in our environment
− Can lead to distortion – cause us to exclude important information, instead only focus on things that confirm our pre-existing beliefs and ideas
KEY STUDY: Brewer and Treyens (schemas - the cognitive approach)
− Procedure: 30 university students arrived individually to the lab + asked to wait in an office containing objects which did and didn’t fit the schema. Taken out of the room + asked to write down everything they could remember from the room
− Findings: most participants recalled the schematic objects e.g. desk + typewriter, some report thing expected in an office but weren’t present. Many recalled the skull – non predicted by the schema
− Conclusion: confirms schema theory + reconstructive memory
− Eval: the study used deception but participants were debriefed and not harmed, sample bias – university students
Theoretic and computer models (the cognitive approach)
− Theoretical models:
→ Simplified representations of the mental processes occurring during certain tasks e.g. memory
Usually diagrams with boxes to indicate parts if the mind + arrows indicating the flow of information e.g. the multi store memory model
- Computer models: likens the way we deal with information to processes carried out by computers
Sensory info –(transfer)– sequence of mental operations –(transfer)– perceptions, memories, behaviours etc.
Emergence of cognitive neuroscience (the cognitive approach)
− Combines several psychological disciplines mainly cognitive psychology + neuroscience
− Focus = look for a biological basis for thought processes that might have been outlined by theoretical/computer models
− Uses new technology to measure the brain + advanced brain imaging methods:
→ PET – scanning method that enables psychologists and doctors to study the brain (or any other living tissue) without surgery. PET scans use radioactive glucose (instead of a strong magnetic field) to help study activity and locate structures in the body.
→ fMRI – brain imaging technique that detects magnetic changes in the brain’s blood flow patterns. This technique can be used to identify behavioral abnormalities that exist because of unusual activation of area of the brain.
− Eval: uses scientific methods + continues to progress as technology advances
Evaluation of the cognitive approach: Scientific methods
P: the cognitive approach uses very scientific methods
E: e.g. lab experiments (Brewer + Treyens)
C: these are controlled and replicable so results are reliable
BUT
P: theses lab studies lack ecological validity
E: artificiality of tasks + environment e.g. Brewer + Treyens lab study
C: therefore, it might not reflect the way people process information in their everyday life