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Approaches, ORIGINS OF PSYCHOLOGY
WUNDT - established first psychology…
Approaches
COGNITIVE APPROACH
Basic assumptions...
- thought processes can and should be studied
scientifically (introspection = too unscientific)
- mind works like a computer (theoretical and
computer models)
- stimulus and response is appropriate but only
if thought processes are acknowledged
Schemas
= collection of ideas about a person
or situation formed through experience
helping the individual understand and
predict the world around them
'mental frameworks' = process large
volumes of data quickly and efficiently
(avoids sensory overload)
- used as a 'reference point' to help us
respond appropriately
unique to each individual = way we see
the world is dependent on what has been
experienced
(own version of reality) - cultural effect
-
-
Cognitive Neuroscience
= study of
biological processes with a specific focus on
neural connections involved in mental processes
scanning machines advanced = ability
to investigate brain activity has improved
(grows with technology)
bridges gap between cognitive science
and neuroscience (1971)
- current focus = neural basis of model-
based planning
TULVING
- shows different LTM (semantic and episodic)
may be located on opposite sides of the prefrontal
cortex
EVAlUATION...
- emergence of cognitive neuroscience has
increased the credibility (objective, reliable data)
- soft determinism = allows for humans to have some
conscious insight into behavior
- practical applications = human-computer interactions
- lab experiments = lacks validity (thought processes
argued to be artificial due to context)
- use of models = oversimplifying complex process
(role of emotion is overlooked) - criticised for comparison to computers - lack free will
PSYCHODYNAMIC APPROACH
Basic assumptions
1) unconscious mind - driving force behind behaviour (access this to sort out challenging behaviour)
2) instincts / drives - motivates behaviour (e.g,
psychosexual stages)
3) early childhood experiences - person we are
FREUD 3 levels of consciousness
- conscious = part of mind we are aware of
- unconscious = thoughts that occur without conscious awareness
- preconscious = thoughts that occur just out of
conscious awareness
FREUD - 'psycho-analysis'
= idea all behaviour is caused by unconscious
internal conflicts over which we have no control
(developed through traumatic experiences)
Tripartite personality
ID = pleasure principle
- birth - 18 months
- selfish part of personality
- demands instant gratification
- conflict with superego
Ego = reality principle
- 18 months- 3 years
- delays gratification
- balanced demands of ID ad superego
(through defence mechanisms)
Superego = morality principle
- 3 - 6 years
- stops behaviour and becomes an individuals conscience
- formed at end of phallic stage
- internalised sense of right or wrong
- conflict with ID
Defence mechanisms
-
Repression = unpleasant memory pushed into
unconscious mind where it is not accessible
(no recall of event / situation)
-
-
-
EVALUATION...
- highlights importance of childhood experiences
(strengthens case for children's right reform)
- practical applications - psychotherapy / psychoanalysis (therapy)
- use of case studies = lack reliability / generalisability
(Freud - culturally specific)
- unconscious concepts - not possible to systematically and objectively measure (Popper - does not meet falsification)
- psychic determinism - subjectivity of interpretations of these meanings - not in line with scientific behaviour
HUMANISTIC APPROACH
Basic Assumptions...
- assumes we have free will (in charge of how we
develop and progress through life)
- every individual is unique (idiographic)
- people should be viewed holistically - e.g, in therapy
whole life should be considered
- scientific measure is not appropriate to measure
behaviour - too objective
-
-
Conditions of worth
-
if they feel these conditions of worth
they do not experience unconditional
positive regard = self-actualisation is more
difficult to attain
-
EVALUATION...
- practical application of therapy - Rogers
client-centred therapy (acknowledges individuals
free will)
- holistic approach - focuses on individuals
subjective experiences (refreshing alternative)
- self-actualisation been widely accepted - BUT criticised for cultural-specific (related to individualistic cultures not collectivist)
- untestable and subjective concepts - lack of empirical evidence (individual differences = difficult to test)
BIOLOGICAL APPROACH
Basic assumptions
behaviour is affected by:
1) genetics - influence behaviour (evolution)
2) CNS (brain and spinal cord)
3) chemistry of body - neurotransmitters and hormones
INFLUENCE OF GENES
Genotype = genetic make-up
- unique to each individual
Phenotype = characteristics that have
occurred as a result of their genes and environment
- physical expression of genotype
(may have same genotype but different phenotypes)
Genetic basis of behaviour
- 24 chromosomes = each individual (genotype)
- MZ twins = 100% genetically similar (if likelihood of
behaviour/disorder is higher than DZ = genetic component)
- indication of how much of the behaviour is genetic
'concordace rates' - Gottesman schizophrenia
- MZ = 48%
- DZ = 17%
(not 100% = mix of genetics and environment)
Evolution & behaviour
- adaptiveness = mutations (survival and
reproduction)
- may take generations
- aggression is adaptive (survival rates)
Natural selection = mechanism of evolution
- genetic transmission of 'beneficial' characteristics
BIOLOGICAL STRUCTURES
CNS (brain and spinal cord)
- transfer messages to and from environment
- actions and reactions generated
PNS
- sends and recieves info to CNS
- e.g, temp, pain, threat
- autonomic system = important for threat
(homeostasis)
- somatic system = movement (muscles and skin)
Neuron
- nerve cell which transfer info through the NS
Endocrine system
- affects transfer and secretion of hormones
throughout the body
- glands (pituitary gland)
- hormone level can affect behaviour
NEUROCHEMISTRY
-
-
Neurotransmitters = chemicals within cerebral
fluid that transmit signals
- in brain
- e.g, high dopamine levels = schizophrenia
EVALUATION...
- practical application in development of drugs
(help symptoms of people struggling with psychological problems - e.g, schizophrenia)
- strong supporter of nature perspective
- adopts scientific methods for investigation (objective - brain scanning)
- biological determinism - lead to 'diminished responsibility'
- reductionist (too simplistic) - fail to acknowledge environment
LEARNING APPROACHES
BEHAVIOURIST APPROACH
Basic assumptions
1) behaviour learned from experience
2) only observable behaviour measured scientifically
3) valid to study animals (share same principles)
4) we are born a 'blank slate' (no genetics)
Classical conditioning
= a type of learning which occurs through
associations made between UCS and NS
PAVLOV - 'salivating dogs'
- food (UCS) & NS (bell) = salivation
- association = bell (CS) & salivation (CR)
points about the process...
1) stimulus generalisation = generlised to other related stimuli (associated with CR) - little Albert
2) stimulus discrimination = stimulus not associated with CR as too different from original stimulus
3) time contiguity = only occured if UCS and NS are
presented at same time
-
WATSON & RAYNER - 'Little Albert'
Operant Conditioning
= learning due to positive / negative
consequences of behaviour
- reinforcement = increases likelihood
- punishment = decreases likelihood
Positive reinforcement = carry out a
behaviour to receive a reward
- e.g, completing hw for praise from a teacher
Negative reinforcement = carry out a
behaviour to avoid negative consequences
- e.g, completing hw to avoid a deterntion
Punishment = makes not doing
something less likely
- e.g, not completing hw = teachers disapproval
SKINNERS box - 'positive & negative reinforcement'
- positive = pressing on level to receive a reward
- negative = pressed leaver to avoid negative consequences of shocks
positive reinforcement = pellet
punishment = electrified floor
negative reinforcement = avoidance of floor
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Analysis of behaviour - ABC
- A = antecedents - what happens prior to behaviour
- B = behaviour - operants (rat pressing lever)
- C = consequences - what happens after operant
Types of reinforcement
Continuous reinforcement = every response is
reinforced
- e.g, receiving high grade for every test
Fixed interval = reinforcement given
every 30 seconds providing response occurs once
- e.g, 15 min break after 1hur studying
Variable interval = reinforcement given every
30 seconds but interval varies trial to trial
- e.g, self-employed receive payment irregularly
Fixed ratio = reinforcement given for
a fixed number of responses
Variable ratio = reinforcement given
on average every 10 responses
- e.g, gambling
- most successful for response rate
EVALUATION
- use scientific methods = creditable
(objectively and systematically collects data in
controlled conditions = increase internal validity)
- real-life applications (development of treatment
and therapies for mental disorders) - e.g, token economies
- deterministic - sees behaviour as a result of past
reinforcements (no room for free will)
- lacks generalisability (animal studies)
- cost-benefit analysis (ethical issues - little Albert)
SOCIAL LEARNING THEORY
Basic assumptions...
- behaviour learned for environment (does not regard genetics as influence)
- behaviour learned from observing others and the
reinforcement / punishment they recieve
- behaviour directly = CC and OC
- behaviour indirectly = vicarious reinforcement
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BANDURA - 'bobo dolls'
- 36 boys / 36 girls (3 - 6 years)
- observed adult: either aggressive or nonaggressive
- children who observed aggressive behaviour acted
more aggressively when observed
- boys = more aggressive than girls
- greater level of imitation if role model is same gender
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EVALUATION...
- difficult to see effects of SL in the long-term
- validity affected (most people would hit a bobo
doll as that's it's purpose)
- demand characteristics = lack internal validity /
mundane realism
-
EVALUATION...
- acknowledges role of human cognition (SLT
recognises mediational processes)
- successfully explains the initiation of certain behaviours
- not a full explanation for behaviour (especially
when no role model - e.g, psychopathic behaviour)
- bobo dolls ignores biological differences between
boys / girls = environmental determinism (may be
explained through hormones)
ORIGINS OF PSYCHOLOGY
WUNDT - established first psychology lab
- studied the mind by breaking down behaviours into their basic elements (structuralism)
- used introspection (= examination of ones own thought processes)
- philosophical --> objective research
Introspection = systematic analysis of our own
conscious experience of a stimulus
(with training these can be observed)
Empiricism = belief all knowledge is derived from sensory experience (it's not innate)
- characterised by the use of the scientific method
Scientific method = use of investigative methods that are objective, systematic and reliable
- based on 2 assuptions:
1) all behaviur is casued (determined)
2) if behaviour is determined it should be possible to predict
how humans would behave in different conditions