Approaches L5 - 10 Flashcards
What do cognitive psychologists often investigate, how and why is this used?
- Internal mental processes
- Using inferences
- Direct observation of cognitive processes is not possible + behaviour is influenced by thoughts
Inference:
Cognitive model might make assumptions about mental processes that cannot be directly observed, going beyond immediate research evidence
Key feature of cognitive approach:
Focuses on attention, memory and how people perceive, store, manipulate and interpret info
What is the brain described as in this approach and why?
- Information processing model
- Input (senses encoding info), processing (info processed via schemas), output (behavioural response)
What mental processes does the cognitive approach?
1) Attention
2) Thinking
3) Store info in memory
4) Retrieve info
Schemas:
- Packets of cognitive frameworks that are developed through experience and expectations about how we should behave
- Act as a shortcut to help organise and interpret vast amounts of info
- Cause exclusion if anything that does not conform
2 types of schemas and what they are:
1) Role schema –> Schema about behaviour expected from someone in particular role
2) Event schema –> Schema about what to expect from an event
Evaluation of cognitive approach: (+3, -3)
+ Many applications in different areas of psychology eg.cognitive psych with negative schema
+ Objective and scientific –> emphasise lab experiments
+ Huge influence on development of cognitive neuroscience (influence of brain structures on mental processes)
- Heavy on internal mental processes often ignored by other models eg. biological approach
- Does not give full picture of what is going on in the brain –> only an inference
- Soft determinism
What is soft determinism and why is this a weakness of cognitive approach?
- Behaviour is constrained by environment or biology
- Cognitive approach does not consider biology, which may have a big impact
What study was conducted about the role of schemas?
Bartlett (1932)
Procedure of Bartlett (1932) study:
Lab setting:
1) English pps asked to read Native American folk tale called ‘The war of the Ghosts’ (unfamiliar story from diff culture)
2) Read story and recall it after different lengths of time
Results of Bartlett (1932) study:
–> All English pps reconstructed story to recall it better:
- Included elements of English culture
- ‘ghosts’ detail left out
- Order of story changed to be more logical
- ‘Canoes’ changed to ‘cars’
- ‘Bows’ changed to ‘guns’
–> Pps remembered less info as more time passed between reading and recalling story
Conclusion of Bartlett (1932) study:
- People use their own schemas to help interpret and remember info, which is dependent on culture to an extent
- Schemas are important when studying internal mental processes
Evaluation of ‘The War of the Ghosts’: (+2, -2)
+ Highly reliable –> lab study
+ Confirms importance of schema theory when investigating internal mental cognitive processes
- Lacks ecological validity –> demand characteristics
- Biased sample –> only English pps, no one from other cultures
When did cognitive neuroscience emerge, who first used the term and why was it needed?
- 1971
- Miller (1991) used it to bridge gap between cognitive science and neuroscience
Cognitive neuroscience:
Scientific study of influence of brain structure on mental processes
Give some examples of technology used to study the brain and what they entail:
- fMRI –> magnetic, measures small changes in blood flow in brain
- PET –> uses radiation, how functions are operating in 3D
Evaluation of information processing model and emergence of cognitive neuroscience: (+3, -2)
+ Dominant in psych eg. helped develop AI
+ Founded on soft determinism –> recognises that humans re free to think before responding to stimuli
+ Cause and effect can be established –> focuses on theoretical computer models and lab experiments
- Reductionist –> oversimplifies behaviour with no role of emotion
- Inaccurate to compare computers to humans
Aim and Procedure of Maguire (2000) study:
Aim: Investigate whether brain is susceptible to plastic changes in response to environmental stimulation
1) Undergo extensive training (The Knowledge) and make ideal grp for study of spatial recognition
2) 32 healthy males (avg age 44) split into 2 grps: one was 16 licensed male London taxi drivers (working for at least 18 months) and second were 16 in control grp who’d never driven taxis before
3) MRI scans taken
Results of Maguire (2000) study:
Right posterior hippocampus (responsible for storing visual representations of environment) was larger in first grp than second –> related to time driver had been in job
Evaluation of Maguire (2000) study: (+2, -1)
+ Supports key aspects of cognitive neuroscience
+ Research evidence supports fact that right posterior hippocampus is involved in spatial awareness from previous rodent and monkey studies
- Lacks pop validity –> only investigated males
Genetics:
Extent to which a psychological characteristic is determined by genes or the environment
How many chromosomes does each person have and what is each one made up of?
- 23 pairs
- Made if DNA, consisting of genes
Genotype:
Genetic code in our DNA inherited from biological parents
Phenotype:
The characteristic of an individual is determined by the expression of physical, behavioural and psychological traits
How does studying twin studies give further research on the effect of genetics?
Use of concordance rates
Evaluation of genetics: (+3, -2)
+ Helps to locate genes on chromosomes
+ Uses twin studies –> useful as concordance rates can be examined to relate to behaviour
+ People can be screened to check if they are carrying genes for specific illness
- Reductionist –> reduces complex behaviour like IQ into just small components like genes
- Ignored other models eg cognitive, where someone who develops depression may not carry the gene but rather have faulty cognitions
What study investigated the role of genes in developing schizophrenia and between what period?
Gottensman and Shields between 1933 and 1948
Features of Gottesman and Shields:
1) 224 sets of twins on Maudley twin register (106 were MZ, 118 were DZ). 120 males and 104 females
2) Avg age was 46 w/ variety of ethnic backgrounds
3) London hospital
4) Longitudinal study
5) Relied on fact that one twin already had schizophrenia and concordance rates investigated to see chances of other twin becoming schizophrenic
6) Used in-depth interviews, doctors case notes and DSM
Results and conclusion of Gottesman and Shields:
- 48% of MZ concordant for schizophrenia
- 17% of DZ concordant for schizophrenia
Chances of developing schizophrenia are higher for MZ twins
Evaluation of Gottesman and Shields: (+2, -2)
+ Longitudinal
+ Supports biological approach
- Ignores behavioural approach, as one twin could’ve copied the behaviour of the other
- Relied on interviews –> some have difficulty w/ communication
Natural selection process:
1) Genetic makeup of an individual can undergo a random mutation
2) Leads to characteristic change in future gens of offspring
3) Chances of survival and reproduction are greater, so gene is passed on and is adaptive
How do physical characteristics vary?
Partly due to genetics and factors in environment
Evaluation of evolutionary approach: (+3, -1)
+ Supported by nature and nurture debate
+ Heavily supported by Charles Darwin’s work and survival of fittest
+ Maximise chances of healthy offspring as they will compete each other by seeking the best mate
- Does not consider behavioural and cognitive explanations –> no free will against competition
What key research study was conducted on sexual selection?
- Buss (1989)
Aim and procedure of Buss (1989):
Aim: Investigate what males and females looked for in long term partner
1) 10,000 pps across 37 cultures
2) Rate 18 characteristics using 4 point scale (1 was worst, 4 was best)
Findings of Buss (1989):
- Females desired males with good financial prospects, resources and ambition
- Males desired females w/ reproductive value and those who were youthful and younger than them
Evaluation of Buss (1989): (+1, -2)
+ Cross cultural validity
- Does not consider social and cultural perspectives that may affect partner choice eg Western cultures value slim body shape, whereas some Eastern cultures prefer larger body shapes
- Lacks temporal validity
Which researcher said that Buss (1989) lacks temporal validity and why?
- Buller (2005)
- Most women today are independent and have their own resources hence do not rely on a mate
2 main biological structures:
1) Nervous system
2) Brain
What 2 sub-systems does the nervous system consist of and it’s features?
- Central Nervous System –> brain and spinal cord, controls breathing and heart rate
- Peripheral Nervous System –> sends and receives messages from CNS to other parts of body