Chapter 4- Issues And Debates (paper 3) Flashcards
What is the nature vs nurture debate?
Extent to which aspects of behaviour are a product of inherited or acquired characteristics
What is heredity?
Genetic transmission of mental and physical characteristics from one generation to another
What is environment (in terms of the nature nurture debate)?
Any influence in human behaviours that is non-genetic. This may range from pre-natal influences in the womb or cultural and historical influences at a societal level
What is the interactionist approach?
Idea that nature and nurture are linked to such an extent that it does not make sense to separate the two, instead researchers study how they interact and influence each other
Who is René Descartes?
Nativist
Argues that human characteristics and even some knowledge is innate- result of heredity
Who is John Locke?
Empiricist
Argued that the mind is a blank slate at birth upon which learning and experience writes: the result of environment- key influence in the behaviourist approach
What is the heritability coefficient?
Used to assess heredity from 0 to 1 , indicates the extent to which the characteristic has genetic basis. 1 suggesting it’s entirely genetically determined
How did Plomin contribute to heritability coefficient?
Highlighted the general figure for heritability in IQ is around 0.5 across multiple studies in a variety of populations. Therefore genetic and environment are important factors in intelligence
What is the nurture aspect of the nature nurture debate?
‘The environment’
Richard Lerner identified different levels of the environment
Eg:
Pre-natal terms like mother’s physical and psychological state during pregnancy
Post-natal such as social conditions child grows up in or cultural and historical context they are part of
What does relative importance of the nature nurture debate mean?
Changed, psychologists are more likely to ask what the relative contribution of each influence is in terms of what we think and what we do
Eg: twin studied is difficult to tell whether high concordance rates is a result of shared genetics or shared upbringing
How does the interactionist approach have relative importance?
Idea that nature creates/ leads to nurture as the heredity and environment interact eg:Belsky and Rovine demonstrated parent-child relationship is ‘two-way’/ reciprocal, the child’s innate temperament affecting the way parents respond. Their responses will affect the child’s behaviour
What is the relative importance and what is the diathesis stress model?
Suggests that psychopathology is caused by genetic vulnerability which is only expressed when there is an environmental trigger
Eg: Pikka Tienari et al found a group of Finnish adoptees were more likely to develop schizophrenia if biological relative had history of disorder (genetics) and the adoptive families were dysfunctional (trigger)
What is epigenetics? How does this have relative importance in the nature nurture debate?
The life experience of previous generations. Refer to changes in our genetic activity without changing our genetic code, happens through interaction with the environment eg: smoking, pollution,war… which leave ‘marks’ on our DNA which can influence genetic codes of our child/ future generations
What did Brain Dias and Kerry Ressler do?
Gave make lab mice electric shocks every time they were exposed to the smell of acetophenone (chemical in perfume) . As behaviourist demonstrated the mice showed fear every time the scent was presented. Furthermore, the rats children and grandchildren also feared the smell even though they had never been exposed acetophenone or electric shocks
Evaluation- strength- implications of nativism and empiricism
Empiricist suggest only behaviour can be changed by altering environmental conditions- so can shape behaviour
This has practical application as desirable behaviours can be reinforced and undesirable behaviours punished/ ignored
This can lead to model societies where it can manipulate its critizens using these techniques
Limitation- implications of nativism and empiricism
Extreme determinism- leads to controversy in attempts to link things like race, genetics, intelligence- socially sensitive
Also raises ethical questions eg: application of eugenics policies
Limitation- shared and unshared environments
Introduced by Dunn and Plomin that individual differences means the siblings experience life events differently eg: age or temperament means that things like parental divorce could impact/ have a different meaning to each sibling
This demonstrates that environment is complex and that even MZ twins reared together do not show perfect concordant rates. This supports the view that heredity and the environment can not be meaningfully separated
Limitation- constructivism
Suggested that people create their own ‘nurture’ by actively seeking environments that are appropriate for their ‘nature’ eg:a more aggressive child is likely to feel more comfortable around children who depict similar behaviour and will ‘choose) their environment accordingly- affects their development
Plomin refers to this as ‘niche- picking’ and ‘niche-building’. Negative as again more evidence that it is illogical to try and separate nature and nurture influences on child’s behaviour
Limitation- relationship to other debates
Too deterministic
A too strong commitment to either nature or nurture position corresponds to a belief in hard determinism
Nativist- ‘anatomy is destiny’ where as empiricists- environment is all. This equates to biological determine and environmental determine respectively
Just like constructivism is similar to ‘reciprocal determinism’ - makes them hard to distinguish
Limitation- genotype-environment interaction:
Scare and McCartney put forward a theory of gene-environment interaction that has 3 types
1) Passive interaction- parents’ genes influence the way they treat their children
2) Evocative Interaction- child’s genes influence and shape the environment in which they grow up
3) Active Interaction- child creates its own environment through the people and experience it selects
This points to a complex and multi-layered relationship between nature and nurture
Examples
Look in booklet for more detail
2 videos- criminal behaviour and acquisition of phobias
Video on twin studies and notes on ‘Three Identical Twins’
How do nature and nurture interact in attachment?
Nature- children’s innate temperament influences the parents response to the child (nurture), the parents response (nurture) is influenced by the Child’s behaviour and
expression of their temperament. (Nature)
What was TEDS? What was the sample size? Duration? Key individuals? Job roles?
Stands for Twins Early Development Study
Began 1994
Kings college London
Over 50,000 families with twins researched from birth to 20 years
Have over 21000 twins
Over 10,000 twin pairs born in England and Wales
Key researchers- Plomin (genetic influences) and Dunn (environmental influences)
Duration- 20 years, collect data from twins at least once every two years
Job roles- variety, wanted creativity but also experts in the subject, data manager, mailers, scientists
Led by over 140 researchers from 50 research institutions
More then 100 collaborators
What aspects of behaviour and development was studied at TEDS?
Potential and limitations
How environment affects us
Prevention, diagnostic and treatment of illnesses
Look at cognition, school achievement, home and school environment, health, well-being, personality, mental health
What were the findings? What traits appear to be inherited?
Intelligence and language development (phonic tests)
Genetics huge in education
Why is TEDS increasingly valuable as it goes on?
The twins in the sample in the TEDS study are reaching adulthood, this is useful because it starts to allow researchers to:
-entering emerging adulthood period-transition from education to work + family- elongated due to demographic changes, no longer simply leave education and get jobs for life. They can look at the twins own children and the predictors from the past. Can compare their children’s results to when they were the same age, this can open up new discussions
Also gaining more access eg: genotyping machines- 30 minutes to get results
Data collection more efficient and more detailed, can go down to bottom line of genetics- more specific
Why are twins so useful?
Unique- provide a natural experimental design- 2 types, identical and non-identical. Distinction can help comparison- can identify the level of genetic influence.
What are the possible implications of TEDS findings for policy?
Vary depend on values eg: Finnish model
Get more publicly- raise awareness
Not environmental or genetic- hard to implicate
More then 500 papers- Plomin- more understanding
Personal educational system due to genetics differences
MORE VIDEO NOTES IN BOOKLET
Evaluation- research methodology strengths:
This evaluation is just summarised- example PEELS with ALL the information is in booklet however this does contain the KEY information and terminology !!
TEDS- huge sample and longitudinal research, range of research eg: questionnaires to swab tests
Managed to look at heredity to specific traits like intelligence
Generalisability
60% of differences between children is due to genetics
70% phonics heritable
Evaluation- strengths historical NN debate:
Application
Treatments for phobias eg: systematic desensitisation
Mental disorders like OCD eg: drug therapy, genes linked with serotonin and environment- drugs can increase serotonin levels meaning transmission of mood- related information takes place
Evaluation- strengths current NN debate:
Insight into how NN interacts, expressed in Scarr and McCartney’s research and the diathesis stress model
Adds external validity to debate
Demonstrates varied and complex
Benefits for society
Explanatory power- crime, development, mental illness
Treatments eg: diathesis stress model lead to drugs and CBT to treat things like OCD
Good application
Evaluation- drawbacks research methodology:
Not all twin studies are effective eg: TEDS needs huge amounts of funding and staff
Need more twins studies as big all research follows participants over time (longitudinal) and don’t have large samples needed-money
Also requires technology which may not always be accessible, which may limit the amount of research they can do and being able to collect data efficiently
Evaluation- drawbacks historical NN Debate:
Too simplistic
Need to look at how NN interact eg: attachment
More evidence- Tienari et al
Lacks validity
Interactionist approach gives more insight
Evaluation- current NN Debate drawbacks
Does not help in trying to find the root cause of certain behaviours eg: psychopaths having different brain structures- more necessary to view genetics separately
What is the idiographic approach?
Idiographic approches think that individuals are unique. The research methods reflect this and look at a person’s subjective emotions and experiences. Methods like case studies and in depth interviews lead to qualitative data. This is more difficult to analyse with statistics because it is more descriptive. By looking for more in-depth insight in individuals, idiographic approaches can be seen as more holistic, looking at a range of factors to form a complete view of the person.
What is a nomothetic approach?
Nomothetic approaches aim to formulate general laws to explain behaviour similarities in large numbers of people. Nomothetic research gives statistical norms for comparison. Research uses large samples and quantitative methods eg: experiment to collect data that is easier to submit to statistical analysis. Nomothetic approches and explanations are more in line with science and are more reductionist
Name some key examples of the idiographic approach:
1) Humanist (Maslow and Rogers):
- these researchers take a phenomenological approach and focus on the individual’s conscious experience of self
- theorists in this field describe themselves as anti-scientific
- concepts used include the hierarchy of needs and person-centred therapy
2) Freud’s psychodynamic Approach:
- a case study described a 5 year old boy with a fear of being bitten by a horse
- this was thought to stem from the boy seeing a horse collapse and die in the street
- this was interpreted as the boy’s fear of being castrated by his father (because the boy loved his mother)
Name some key examples of nomothetic approaches:
Radford and Kirby (1975)-Types of Law made by nomothetic approaches:
1) Classifying people into groups eg:DSM
2) Establishing dimensions that can be used to assess people and compare them eg:Use of the normal distribution curve
3) Establishing principles of behaviour that can be applied to people in general eg: Behaviourism like attachment or acquiring phobias
Biological approach eg:
- Tulving used PET scans to locate episodic and semantic memories in different parts of prefrontal cortex
- biological explantations and treatment of OCD looking at neurotransmitters eg: serotonin and dopamine
Name some key idiographic approaches from OTHER MODULES/TOPICS:
Attachment and Koluchová Twins
Approches- humanism
(Explanation in booklet)
Name some key nomothetic approaches from OTHER MODULES/ TOPICS:
Attachment- learning theory
Psychopathology-DSM, drug treatments for OCD
Memory- MSM (Multi-store model)
How does information from idiographic and nomothetic approaches compare?
Both idiographic and nomothetic approaches are used in research to give insight into a topic
Researchers choose methods to suit a particular area eg: case studied and detailed interviews can be appropriate for studying sensitive issues like addiction
Idiographic case studies can link with nomothetic approaches in different ways eg:
- case studies can identify details that challenge what a general nomothetic theory says
- Case studies can identify particular details suitable for further nomothetic research to make general laws about groups of people
What is the compromise between ideographic and nomothetic approaches? Give examples:
They complement each other and can be used to give a fuller explanation and understanding of behaviour
Attachment- case studies like Genie and the Kulochova Twins have added detailed insight. This detailed insight is used as well as Bowlby’s theory to understand factors that affect development
Psychodynamic approach- idiographic case studied are used to make general (nomothetic) laws about behaviour eg: many people use defence mechanisms, the unconscious has an important role influencing behaviour. The psychosexual stages of development are general laws about development, but a person may have individual different experiences so develop differently
Memory- idiographic case studies include eg: HM and KF. These hell illustrate the nature and function of short term memory.
-Miller’s nomothetic work on the STM capacity suggests a limited of 7+/-2 units that is a general law that assumes many people are similar
What is a strength of the idiographic approach in terms of the level of detail?
A strength of taking an idiographic approach is the type of data collected.
By using more qualitative methods eg: case studied and in-depth interviews, researchers gather rich and subjective information about the individuals experience.
This information provides detailed insight about a person and allows researchers to explore issues in greater depth. This is useful for identifying new research questions and challenging established theories. Because it is more detailed the data has greater validity
Therefore idiographic approaches make useful contribution to psychological understanding
What is a strength of the nomothetic approach in terms of data?
One strength is the type of data collected
By using quantitative methods eg: the experiment or large scale surveys, researchers gather objective data from many people
This data can be analysed using statistics to identify trends and patterns
This adds insight into a range of areas in psychology eg: the function of cognitive processes or effectiveness of drugs
This gives nomothetic approaches good generalisability. Therefore, the data collected contributes to the formulation of theories and general laws
Which one is more applicable to life? Idiographic or nomothetic?
In terms of application, nomothetic approaches are stronger and use general laws in different ways. This had led to useful applications in more than one area eg: DSM for classification of mental illness, the normal distribution curve for assessment of IQ, and the formulation of theories eg: learning theory and biological explanations of behaviour
How do the idiographic and nomothetic approaches complement each other?
Look at PEEL in notes
What is holism?
An argument or theory which purposes that it only makes sense to study an indivisible system rather than its constituent parts (which is reductionist)
What is reductionism?
The belief that human behaviour is best explained by breaking it down into smaller constituent parts
What is biological reductionism?
Attempts to explain social and psychological phenomena at a lower biological level eg: genes, hormones
What is environmental reductionism?
Attempt to explain all behaviour in terms of stimulus- response links that have been learned though experience
Who are gestalt psychologists?
Basis of holism, inappropriate to break up behaviour/ experience as you can only understand a person/ behaviour as a whole eg: shared with humanistic psychologists who see the whole person
What is reductionism based on? What is it?
Parsimony.
That all phenomena should be understood at most basic principles. Often the most simple, easy and economical explanation
What do different levels of explanation mean in psychology?
Different ways of viewing the same phenomena eg:
- OCD could be understood in a socio-cultural context eg: repetitive hand washing, the most people would regard as odd or irrational. It could also be seen from a psychological level eg: obsessive thoughts, a physical level eg: sequence of movements in hand washing…
It’s a debate on best explanation, each is more reductionist
Psychology can be placed within a hierarchy of science eg: more precise and ‘micro’ disciplines at the bottom to more general ‘macro at the top’
Those who believe in the reductionist approach would see it as being derived from sciences lower down in the hierarchy
Explain biological reductionism in relation to levels of explanation:
Organisms made up psychological structures and processes. All behaviour is at some level biological eg: neurochemical, evolutionary and genetic influences
Links to biological approach and links to things such as the effects of psychoactive drugs and can explain serious disorders like OCD, depression and schizophrenia at a biochemical level
Explain environmental (stimulus-response) reductionism in terms of levels of explanation:
The behaviourist approach is built on environmental reductionism eg: breaking learning up into stimulus- response links that are measurable in a lab
Key analysis works at a physical level rather than psychological/ cognitive level
Regarded as a ‘black box’- irrelevant in understanding behaviour
John Watson (behaviourist) spoke of it as ‘sub-vocal’ speech, characterised by physical movement like any other behaviour
What are the strengths of holism?
1) Aspects of social behaviour that only merge within a group context and can’t be understood at an individual level eg: effects of conformity to social roles and the de-individuation of the prisoners and guards. This can’t be studied by looking at the participants as individuals. The interaction between people and behaviour of the group was important.
2) They provide more of a complete and global understanding of behaviour than reductionist approaches
What are the weaknesses of holism?
1) Not much rigorous, scientific testing and can become vague and speculative as they become more complex eg: humanistic psychology- lack of empirical evidence
2) Practical dilemma eg: if there are loads of explanations for depression it is difficult to establish which is most influential and which one to use eg: in therapy. Therefore it is hard to find solutions for real world problems
What are the strengths of reductionism?
Forms basis of scientific research
In order to operationalise it is necessary to break behaviours into parts. This means it’s possible to conduct experiments or record observations (behaviour categories) in a way that is meaningful and reliable
Demonstrates how complex learning can be broken down into simple stimulus- response links within the lab
More credibility, placed on equal terms with natural sciences lower in the reductionist hierarchy
What are the weaknesses of reductionism?
Accused of oversimplifying complex phenomena- leads to a loss of validity
Explanations of the gene, neurotransmitter or neutron do not include the social context within which the behaviour occurs and this is where the behaviour may derive its meaning
Although the psychological process may be the same regardless of the context it does explain why that behaviour has occurred
Therefore reductionist explanations can only ever form one part of an explanation
What are the strengths of taking an interactionist approach?
Eg: diathesis stress model. Takes an interactionist stance- now different labels of the explanation may combine and interact.
Can provide a move multi-disciplinary and holistic approach to treatment eg: combining drugs and family therapy- lower relapse rates
What was Smith et al (1947) study on paralysing the vocal cords?
Smith et al did an experiment to challenge Watson’s idea of ‘sub-vocal’ speech. He ingest curare (poison) causing all his muscles to become paralysed. This was to see if thinking is merely sub-vocal speech then preventing any speech movements at all should make it impossible to think
Smith was kept alive using an artificial oxygen supply but he was still able to recall and solve cognitive puzzles even in a state of paralysis
Contradicts Watson’s theory it demonstrates you do not need physical movements to shape the process of thoughts . As he thought the process of thought itself was characterised by physical movements
What did Wolfgang Köhler (1925) do that supported holism?
Wolfgang Köhler (1925) set Hungary chimpanzees a puzzle. A banana and stick were placed outside the chimpanzee’s cage. The stick was in reach but not the banana. The chimpanzee tried to get the banana but failed. It stopped trying but returned shortly afterwards using the stick to rake in the banana. This provides insight into learning and demonstrates it can only occur when all the elements of a problem (arm, stick, banana, distance) are understood in a meaningful whole as the chimpanzee found the inter-relationship between them.
Booklet definition and explanation of holism:
It argues that it only makes sense to study behaviour as a whole. Hence the complete ‘whole’ circle
Indivisible system
Eg: biological AND environmental influences on behaviour, family, leisure and job context
The sum of the parts does not equal the whole
Booklet definition and explanation of reductionism:
Human behaviour is best explained by breaking down into constituent parts
The belief that the best way to research and understand behaviour is by ‘reducing’ it down to its smaller parts or units eg: the genetic explanation of schizophrenia or the role of hormones in aggression
The scientific principle of ‘parsimony’ suggests all phenomena should be explained using the most basic principles
When explaining use terminology like so…
- It reduces the behaviour down to the units of….
- if reduce down to a unit, more measurable and use it to be more scientific
What are levels of explanation (booklet):
The idea of ‘levels of explanation’ is that there are different ways of viewing the same behaviour. Higher levels tend to be less scientific and consider a range of factors affecting behaviour, lower levels are more reductionist and scientific looking at behaviour in terms of one basic aspect of unit to explain behaviour
Give examples and description of each level of explanation (booklet):
Higher (more holistic) eg: social and cultural explanations eg: how groups effect behaviour
Middle - psychological explanations eg: schizophrenia involves thought disorder
Lower (more reductionist) eg: biological explanations like hormones and genes
Give an applied example of how the different level of explanations explain a behaviour:
OCD
Higher (social and cultural)-Producing unusual or irrational behaviour
Middle (psychological)- obsessive thoughts
Lower (biological):
at a physical level-a sequence of movements involved in washing ones hands
At a physiological level- hypersensitivity of the basal ganglia
At a neurochemical level- underproduction of serotonin
Give an example of holism in psychology (booklet), why?
Humanistic psychology
Subjective experience can only be understood by considering the whole person
What matters is a sense of unified identity. The person needs to feel a sense of ‘wholeness’ to stay mentally healthy
Therapies eg: Roger’s client centred therapy aims to bring together all aspects of the whole person
What is the perception of the holism vs reductionism debate by Gestalt psychologists (booklet), what did they learn from chimpanzees?
These psychologists argues that what we can see can only make sense by considering the whole of an image not just the individual parts
Gestalt psychologists also looked at learning and applied ‘insight learning’ to chimpanzees. This meant when a solution to a problem suddenly comes to us in a flash
Holism explained insight learning shown in Kohler’s chimpanzees as theorists suggest this happens when all elements of the problem are understood as a meaningful whole allowing a solution to be found
What is parsimony (booklet)?
Scientific principle which suggests all phenomena should be explained using the most basic principles
How is reductionism explained in an biological, environmental and experimental sense?
Biological- reduces social and psychological behaviour to biological units eg: genes and hormones, brain structures and neurotransmitters
Environmental- (behaviourism) reduces complex behaviour to units of stimulus and response- links that are learned through experience
Experimental- reduces complex behaviour to a form or unit that can be studied. Variables are isolated , manipulated and measured
Give some examples of environmental reductionism:
Behaviour can be modified using reward to strengthen a given behaviour eg: praise a child for being good
Attachment is formed through stimulus response links in where a child learns to associate its mother with the pleasure of food
Units of stimulus and response can be used to explain the acquisition of phobias through classical conditioning
Give some examples or biological reductionism:
The dopamine hypothesis of schizophrenia explained the illness in terms of neurotransmitters
Evidence suggests OCD is influences by a brain circuit involving the frontal cortex, basal ganglia and the thalamus
The MAOA gene is implicated in aggression
Give some examples of experimental reductionism in psychology:
Loft us work on EWT in the lab operationalised variables ina way to make them measurable
Cognitive psychologists assess mementoes using lists of words and nonsense words recalled in a set amount of time
What is the compromise/ interactionist approach in the holism vs reductionism debate?
The interactionist approach suggests there is more than one level of explanation which may operate at one time
Interactionist approach looks at HOW these different levels may combine and interact in behaviour
Give an example of the interactionist approach in the holism vs reductionism debate- schizophrenia:
Interactionist explanations accept that there are different levels of explanation for schizophrenia but they also suggest that more than 1 level of explanation can operate at the same time
Higher- background of family dysfunction/ started a new job
Middle- dysfunctional thought and processing
Lower- father with a diagnosis of schizophrenia
Give an example of the interactionist approach- diathesis stress explanation of schizophrenia:
Example of how different levels of explanation can interact at the same time in schizophrenia
Lower- diathesis eg: genetic disposition + higher- stressor eg: starting a new job, divorce… = schizophrenia
Explain why the interactionist approach is not the same thing as holism
Interactionist- compromises between holistic approches and reductionist approches
Interactionist- can look at different levels of explanation at the same time to come to a fuller understanding
Holism- all aspects of behaviour as being indivisible- can’t separate them- have to look at as a whole where as interactionist accosts they are separate but can look at them as part of an explanation- more insight
Look at booklet for PEEL examples and comparison paragraph, but here are some pointers…
- strong links to evaluating science. Reductionist approaches reduce behaviour down to units that are measurable. As a result, they are more testable, and research is more replicable.
What are some strengths of reductionism?
Reliability- operationalising variables gives measurable units of behaviour eg: stimulus response units
Validity- these approaches give psychology greater scientific credibility
Reliability- operationalising variables gives measurable units if behaviour eg: genetic research and neurotransmitters in schizophrenia
Application- systematic desensitisation and flooding are used to treat phobia
Application- biological explanations have led to drug therapies for a range of mental illness
What are the weaknesses of reductionism?
Validity-genetic is biological explanations do not include the social context of behaviour seen in higher levels of explanation
Application- drug therapies based on lower levels of explanation treat one aspect of complex mental disorders like schizophrenia
Validity/ generalisability- evidence for stimulus response links is based on animal research in lab settings
What are the strengths of holism?
Validity- higher level explanations give more complete global understanding
Validity- high levels of explanation take all factors affecting the individual into account eg: humanist explanations
Validity- looking at group contexts and group behaviour gives good understanding of social bahviour eg: de individuation in the Stanford Prison Experiment
What are the weaknesses of holism?
Generalisability/validity- humanist approches reject scientific method and it is difficult to test the concepts