PS122 History of Psych Flashcards
(126 cards)
Plato
Rationalism - Senses can be deceiving.Thus they should not be trusted.
People should relyonlogicinstead
Allegory of the Cave
Prisoners in a cave can only see shadows on a wall
These shadows become their reality
Only once they are allowed to leave the cave can they see ‘real’ objects
Cave is a parable of the human condition
Soul imprisoned in body and forced to look at imperfect copies of objects. “Forms” are the only true (perfect) example
Empiricism
Contrasts with Rationalism. Emphasises role of experience. Gains information through sensory perception and observation.
Aristotle (384-422 BC)
He gained his knowledge from observation, believed that observation and analysis are reliable.
Hence he was an empiricist
However, he did no experimentation. Studied living things and analysed the nature of causes. He defined the ‘soul’ as that which animates and gives form to matter.
Rene Descartes
Born in 1956. Rationalist. I think therefore I am.
Mind-body Dualism
He (Descartes) made an ontological distinction:
Mind (res cogitans) and Matter (res extensa) are fundamentally different things.
Matter occupies space, but doesn’t think.
Mind thinks, but doesn’t occupy space
The human mind is uniquely reflexive, linguistic and rational.
John Locke
KEY THEMES
How do we acquire knowledge?
Nature vs. Nurture
We do not have innate ideas. ‘Tabula Rasa’ Life is a blank slate.
Perception vs. Reality
This model was proposed by John Locke
Primary Qualities - Objective Physical World (Matter, Energy and Motion)
Secondary Qualities - Subjective mental life (Intentions, Ideas and feelings)
Meaning is assigned by secondaery qualtities
David Hume
Born 1711 one of the central figures of the ‘Scottish Enlightenment’.
But argued that reason is the slave of passions.
We argue from our convictions, not to them
One of his aims was to answer the question: “What do we really know from experience?”
Experienceactually provides fewergrounds for beliefthan weconventionally assume.
“No amount of observations of white swans can allow the inferencethat all swans are white, but the observation of a single black swan issufficient to refute that conclusion.”
Problem of falsifiability
Repeated instances do not justify ontological induction.
Correlation is not causation
Moreover, this reasoning applies to what we take to be causes.
Flames have has so often been accompanied by the experience of heatthat we take them to be the cause of heat.
But there is nonecessaryreason to do so, it is merely a habitual belief.
Cause itselfis not perceivable.
Is the “Mind of Man” no more than a mechanism?
Modern Psychology emerged between1850 - 1900
Principles of materialism and mechanism expressed the spirit of Modernism.
Around 1840, Helmholtz, Brücke and other German scientists signed an “anti-vitalism” (vitalism is the rejection that life is sustained through biology) oath:
“No other forces other than the common physical-chemical ones are active with the organism”
How do we quantify the psychological processes we are interested in?
- Psychometrics: Intelligence testing
- Psychophysics: perception and sensation
- Structuralism and consciousness
Psychometrics measures things like:
Intelligence
Personality
Aptitudes for specific skills or occupations
Nature or degree of mental illness
Educational problems
Sir Francis Galton (1822-1911)
Cousin of Darwin
Born in Birmingham
Made first weather maps
Classified fingerprints
Great statistical contribution to Psychology
Galton suggested Intelligence could also form a normal distribution. Developed the “standard deviation”. Plotted scores from top 100 candidates at Cambridge. Published Hereditary Genius (1869)
Individual differences in intelligence must be innate!
Intelligence runs in families
E.g. Brontës in literature; Bachs in music
Galton board
TheGalton board, orbean machine, is a device invented by SirFrancis Galton to demonstrate that with sufficient sample size thebinomial distributionapproximates anormal distribution. Among its applications, it afforded insight intoregression to the mean
Inheritance of Eminence
Classified families as ‘eminent’ (famous, respected or important) not
For the most eminent family member:
31% of fathers were eminent
27% of brothers were eminent
48% of sons were eminent
5-8% of grandfathers, grandsons, uncles and nephews were eminent
Closer the kinship, the greater the likelihood of eminence (gene sharing)
First attempt to account for heritability of psychological characteristics
BUT: Closer the relative, the more likely to share the environment
Eugenics
Galton believed that, because horses can be bred with certain characteristics, so could humans
“produce a highly gifted race of men during several consecutive generations”
Eugenics - Improving the human race by selective breeding
Set up AnthropometricLab
(Eugenics generallyabandoned after early20thcentury)
Binet intelligence scales
Alfred Binet was a French doctor (1857-1911), influenced by Galton and Darwin
In 1905 joined a government commission to identify school children with “mental handicap”
Wanted to create a fair system of testing intelligence testing, not based on previous education experience
Used large banks of tests, including word associations, drawing, and digit span
Realised that age needed to be considered!!
First intelligence test
Binet and Simon constructed first usable test of intelligence (1905)
Comprised of 30 separate items with increasing difficulty
E.G. Follow lighted match with eyes (attention)
What is difference between paper and cardboard?
Construct a sentence with ‘Paris’, ‘river’, ‘fortune’
Intelligent Quotient
German psychologist William Stern introduced Intelligence Quotient in 1912:
IQ = mental age/ x 100
chronological age
E.g. Child of 10 who has a mental age of 12 would have an IQ of 120 (12/10*100)
Higher IQ = superior
Intelligence testing today
Mental testing and IQ is still in common use, but much developed
Tests often updated every few years
Wechsler Adult Intelligence Scale (WAIS) and the Wechsler Intelligence Scale for Children(WISC).
Galton’s and Binet’s ideas very influential and have had a major impact on modern psychology
Franz Joseph Gall
1758-1828
Found nerve fibres passing from one side to the other of the brain (commissures)
Comparative anatomist – compared brains
In general, the larger the brain the more advanced the mental functions
(Mostly accurate except in adult human population)
Phrenology
Gall believed that certain ‘faculties’ were based in specific parts of the brain…
In some ways true: motor area, visual area, language, executive control etc.
Bumps and indentations onsurface of the skull reflect thesize of “phrenological organs” in the brain
Ultimately discredited but the initial ideas were based on empirical observations
There were flaws in the logic though
Psychophysics
Returning to our main problem: how do we measure the mind scientifically
Physics was the natural model for early psychology.
Hence, Psycho-physics, the objective investigation of subjective experience.
Interested in sensation and perception