PS122 History of Psych Flashcards

(126 cards)

1
Q

Plato

A

Rationalism - Senses can be deceiving.Thus they should not be trusted.
People should relyonlogicinstead

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2
Q

Allegory of the Cave

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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

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3
Q

Empiricism

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Contrasts with Rationalism. Emphasises role of experience. Gains information through sensory perception and observation.

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4
Q

Aristotle (384-422 BC)

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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.

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5
Q

Rene Descartes

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Born in 1956. Rationalist. I think therefore I am.

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6
Q

Mind-body Dualism

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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.

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7
Q

John Locke

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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

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8
Q

David Hume

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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?”

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9
Q

Experienceactually provides fewergrounds for beliefthan weconventionally assume.

A

“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.

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10
Q

Correlation is not causation

A

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.

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11
Q

Is the “Mind of Man” no more than a mechanism?

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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”

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12
Q

How do we quantify the psychological processes we are interested in?

A
  1. Psychometrics: Intelligence testing
  2. Psychophysics: perception and sensation
  3. Structuralism and consciousness
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13
Q

Psychometrics measures things like:

A

Intelligence
Personality
Aptitudes for specific skills or occupations
Nature or degree of mental illness
Educational problems

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14
Q

Sir Francis Galton (1822-1911)

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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

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15
Q

Galton board

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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

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16
Q

Inheritance of Eminence

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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

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17
Q

Eugenics

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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)

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18
Q

Binet intelligence scales

A

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!!

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19
Q

First intelligence test

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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’

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20
Q

Intelligent Quotient

A

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

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21
Q

Intelligence testing today

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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

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22
Q

Franz Joseph Gall

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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)

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23
Q

Phrenology

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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

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24
Q

Psychophysics

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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

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25
E.H Weber
1795-1878 Pioneered methods for measuring the sensitivity of the senses. Especially looked at thresholds Conscious sensations of a stimuli may not reflect reality. One way of constraining the problem of subjectivity is to measure thresholds. Absolute Thresholds are the smallest quantities that give any sensation at all. level of stimulus intensity at which stimulus can no longer be detected Relative thresholds (Just noticeable difference ) are the smallest quantitative change that is noticeable. minimum difference (e.g. brightness) between two items to be able to tell them apart
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Just Noticeable Differences
Relative thresholds are also known as “Just Noticeable Differences” - JND’s. The Weber - Fechner Law states that JND’s are a constant proportion of the absolute intensity. It was hoped that psychophysics would steadily discover all such laws.
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Hermann Von Helmholtz
1821-1894 One of the greatest 19th Century Physiologists. Adopted a ‘Doctrine of Mechanism’ (opposed to vitalism) Rate of neural conduction: Initially used a frogs leg Stimulating the nerve in the leg would cause the foot to twitch Stimulated different distances from the foot and measured time taken for foot to twitch Calculated the Neural conduction = 25 meters per second
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Helmholtz: Trichomatic theory
Groundbreaking work on colour perception Noted only 3 colour receptors (cones – RGB) But can see many different hues Hues arise from a mix of cones excited to different degrees
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Helmholtz: Unconscious inference
Realised that image on the retina may not accurately reflect the external world E.g. Blind spot – brain ‘fills’ in this area Sometimes the brain’s perceptions contradict the raw sensations Visual illusions Derive the most probable explanation (unconscious inference) Based on prior visual learning experience
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Gestalt Psychology
Psychophysics revealed a lot about the senses,  but not much about how sensations become perception. Gestalt psychology - ‘A whole is more than it’s parts’. Principles  emergence reification multistability  invariance
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Wundt
Considered the founder of experimental psychology Set up first experimental psychology lab at Leipzig, Germany (1879) Supervised 186 PhDs including Titchener, William James, Cattell Cultural psychology 10 volume work on cultural psychology Religion, language, myths, history, art, laws, customs Not only shaped by senastion/ perception, but by culture. Very interested in language – verbal communication of idea one wants to say.
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Wundt and Structuralism
Wondered whether complex mental experience could be broken down into simple processes: building blocks Influenced by physicists and chemists breaking down molecules into atoms (e.g. water into hydrogen and oxygen) Method: Systematic introspection
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Introspection
There is external observation and internal observation (inside own mind) Wundt described psychology as the ‘science of conscious experience’ Therefore the best method is to observe the conscious experience However, only the person having the experience can observe it… Thus he used introspection Observation: Observer must pay close attention to the stimulus (used observers trained in introspection) Experimental control: Experiment creates external conditions that are stable across time and participants Observer must report the elements of consciousness (e.g. duration of a stimulus, size etc.)
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Wundt: Problems for introspection
Wundt noted that introspective reports were unverifiable Memory can often play tricks with recollection of psychological states As a result higher mental processes will be too complex to study
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Criticisms of Introspection (1)
Participants may not agree on their introspections  Problem of validity: Who was right? As it’s subjective, repeating the study will not help  Wundt acknowledges this problem but thought that further training could help
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Criticisms of Introspection (2)
Introspection could also be classified as ‘retrospection’.. .. depending on the time between the stimulus and report Examining an experience in an introspective manner may alter it  (e.g. introspecting on anger may cause the anger to subside)
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Criticisms of Introspection (3)
Imageless thoughts In problem solving often cannot report on their introspections. The solution ‘just appears’ Implies that many psychological processes are not available for introspective access
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William James
First to teach psychology courses: Harvard 1875 “ the stream of consciousness”  Consciousness is not a thing, but a process.  Unlike Wundt, James did not believe in breaking down experiences.  Pragmatism – “true beliefs” are those the believer finds useful. Functionalism 
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Phillipe Pinel
Pioneer in humane treatment of patients, classification of disorders.
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Roots of Freudian Theory
After work with Charcot, Fliess and Breuer, Freud became convinced that mental illness was not just physiological and that psychological treatment could be effective. Breuer’s ‘talking cure’ was the seed for psychoanalysis. Freud’s clinical work suggested that many neurotic symptoms could be traced to early traumas, unconscious in adult life, that affected the development of personality. He abandoned an early theory of ‘childhood seduction’, but he retained the idea that sexuality was a part of early parent-child relations.
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Who was the first patient treated by the talking cute?
Anna O - A patient with Hysteria
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Psychodynamic Perspective
Freud believed psychology influences caused disorders Wanted to see what these psychological influences were Psychoanalysis Treatment Process: Patients revealed painful, embarrassing thoughts in the unconscious (through talking, free association). Once these memories were retrieved and released... the patients then would feel better
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Conscious, preconcious and unconscious
Conscious - what you are currently aware of Preconscious - info not in conscious but is able to be retrieved when needed Unconscious - Massive amount hidden from view
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Id
Primitive, unconscious portion of the personality Houses the most basic drives and stores repressed memories “Pleasure Principle”
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Superego
Mind’s storehouse of values, moral attitudes learned from parents and society, same as common notion of conscience
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Ego
Conscious, rational part of personality Charged with keeping peace between superego and id
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Eros and Thanatos
Eros and Thanatos (Love and death) Eros drives us toward life and procreation Thanatos drives us to risk-seeking Death instinct - people have an innate attraction to death and destruction e.g watching true crime
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Freudian slips
“Slip of the Tongue” not something you meant to say, but was brought out through your unconscious thought
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Latent content of dreams
Symbolic meaning of dream images, what your unconscious mind is thinking
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Hypnotherapy
Franz Anton Mesmer “mesmerism” Jean-Martin Charcot Neurologist who used hypnosis on patients Joseph Breuer Could reduce severity of symptoms
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Free Association
Developed by Carl Jung - write a word down and then create lines to other words associated with this
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How does the ego negotiate between the id and the superego?
These clashes are called intrapsychic or psychodynamic conflicts. Psychic energy cannot be destroyed, only redistributed. This process can cause stress and anxiety. The ego tries to prevent anxiety, guilt and other unpleasant feelings. Sometimes the ego helps us negotiate situations well and sometimes we use… Defense Mechanisms
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Psychosexual development
Freud believed that personality formed during life’s first few years divided into: Psychosexual Stages During these stages stages the id’s (the devil) pleasure seeking energies focus on pleasure sensitive body areas called erogenous zones. THE PLEASURE PRINCIPLE In each stage the child must get enough gratification to be able to move to the next stage Too much gratification can cause problems Too little gratification the child can not move to the next For normal development a child must work through all the stages Fixation - being stuck and struggling through a particular psychosexual stage. You move on in life, but may have ‘issues’ that arise from the struggles during that stage.
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The Oral stage (birth-18 months)
1: The Oral stage (birth – 18 mths) focus on the mouth Pleasure is gained through sucking e.g. Breast feeding If child stays fixated in this stage in adulthood can be Smoker Bite fingernails Sexually attracted to large breasts
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The anal stage (18 months to 3 years)
2: The anal stage 18 mth – 3 years Focus on the anus Pleasure gained from going to the toilet e.g. Potty training If child stays fixated in this stage in adulthood can be: Anally retentive – fussy, overly tidy, OCD (if punished during potty training) Anally expulsive - messy & disorganized
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The phallic stage (3-6 years)
The phallic stage 3 – 6 years Focus on the genitals Exploration and interest in genitals In Greek mythology - a phallic symbol is that of a male genital and deal with incestuous feelings. Go through either: The Oedipus Complex (for boys) The Electra Complex (for girls)
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Oedipus Complex
Young boy desires his mother Jealous of father for his mother’s attention and larger penis Fear father will castrate him STATE OF CONFLICT! Resolved by identifying with father and repressing desire for mother This gives rise to development of superego
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Electra Complex
She starts to sexually desire her father who has a penis. The girl begins to develop penis envy. She blames her mother for removing her penis. The girl sees her mother as a sexual rival for her father. To resolve this, the girl represses her feelings for her father and begins to identify with her mother The superego develops, she replaces penis envy with desire for a baby.
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Identification: End of the Phallic Stage
Children cope with the threatening feelings by repressing them and by identifying with the rival parent. Through this process of identification their superego gains strength incorporating parents’ values.
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The Latency Stage (6 years to Puberty)
The sexual drive remains dormant Focus on school play mostly with same sex peers Until puberty begins
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The genital stage (adolescent and up)
5: The genital stage (adolescent & Up) Focus on genitals Begin to become attracted to the opposite sex Adult sexuality. Feeling more comfortable with the mature understanding of what sex means and what is about. Comfort and maturity in expressing with the sexual feelings towards others.
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Legacy of Freud
Developed grand ideas with massive overall and overarching reach. No longer influential in psychology, but in literature ! Therapeutic Influence He didn’t invent the talking cure, but popularized it as a treatment for psychology disorders that is still used today Personality stages and theory 1st comprehensive personality theory ever! Role of the Unconscious Freud’s theory pins itself to the unconscious and there are MANY ways that the unconscious mind plays a pivotal role in human behavior.
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Who were the Neo-Freudians?
Adler, Horney, A. Freud, Jung
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Alfred Adler
Like Freud, Alfred Adler believed in childhood tensions, however these tensions were social in nature & not sexual. A child struggles with inferiority complex during growth & strives for superiority & power. Founder of “Individual Psychology” (his term for personality). Studied ‘inferiority complex’ and is recognized for making major breakthrough in that area of Personality.
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The inferiority complex
Thought Freud emphasized unconscious too much. There are conscious drives too! Began early work with people with physical disabilities. Observed that while some people with disabilities motivated to overcome, others felt defeated We gain confidence when we realize we are able to meet external goals (those who do not learn this develop inferiority)
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Karen Horney
Karen Horney (Horn-nay) felt that sex and aggression were not the primary constituents for determining personality. Horney believed in the social aspects of childhood growth and development. Children were trying to overcome a sense of helplessness. She countered Freud’s assumption that women have weak superegos and suffer from “penis-envy.” Freud believed that boys had the power and were given more opportunities. Freud believed that women envied those opportunities. Considered a founder of “Humanistic Psychoanalysis” & “Feminist Psychology”
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Karen Horney - Tyranny of 'shoulds'
“Shoulds”: internalized beliefs from toxic environment. Toxic social environments create unhealthy belief systems in people “bargain with fate”- we think we can control environment if we follow shoulds. “Real Self” (authentic desires) vs. “Ideal self” (should).
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Anna Freud
The super ego becomes clear only when it confronts the ego with hostility. Super ego speaks with language of guilt and shame We hear the super ego when we berate ourselves.
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Defense mechanisms
Methods used by ego to unconsciously protect itself against anxiety caused by conflict between id’s demands and superego’s constraints. - only unhealthy when they cause self-defeating behavior & emotional problems {remember id=devil; super ego=angel}
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Carl Jung
Carl Jung (Yung) collective unconscious which contained a common reservoir of images derived from our species’ past. A psychotherapist who founded analytical psychology. Jung proposed and developed the concepts of the extraverted and the introverted personality, archetypes, and the collective unconscious. His work has been influential in psychiatry and in the study of religion, literature, and related fields. Jung's primary disagreement with Freud stemmed from their differing concepts of the unconscious. Jung saw Freud's theory of the unconscious as incomplete and unnecessarily negative. Archetypes - universal symbolic images that appear across cultures in myths, art, stories, & dreams
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The collective unconscious
Myths and symbols are strikingly similar across cultures Result from a shared knowledge and experience The memory of this shared experience is the “collective unconscious” Expressed as archetypes: symbols that organize behavior patterns
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Carl Jung - Archetypes
Wise old man The Goddess The Shadow The Hero The trickster The Animus (masculine component of female personality) The Anima (feminine part of male personality) The Persona – our public image
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What are the problems of a psychological science?
- Early experimentalists focus on measurement - How do we measure mind and consciousness? - Methods of introspection have limitations - Psychoanalysis looks at unconscious mind
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Behaviourism: Reaction against the Unobservable
Introspection is not verifiable, subjective not objective. - Caused a shift to 'behaviourism' - Where psychology is not about experience but about observable objective behaviour - Used animal learning as can carefully control environment
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Pavlov's Classical Conditioning
“a type of learning in which a neutral stimulus acquires the capacity to evoke a response that was originally evoked by another stimulus”
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Conditioned reflexes
Found associations between previously unlinked stimuli Unconditioned Stimulus (food) Unconditioned Response (salivating) Conditioned Stimulus (bell) Conditioned Response (salivating)
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Edward Thorndike (1874-1949)
Focused on the acquisition of behaviour Looked at how cats learned to escape from a puzzle box Animal made a response and was rewarded if it was correct (escaping and food) S-R PROBABILITIES: (Stimulus-Response) Learning occurs when there is an increase in positive S-R probabilities Forgetting occurs when there is a decrease in positive S-R probabilities
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What is the law of effect?
Behaviour depends on consequence (reward/punishment)
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J.B Watson (1878-1959)
Founder of behaviourism Did not like introspection, Or participating in introspection Wanted a break between philosophy and psychology Knowledge should be based on observable phenomena Learned about Pavlov’s work with animals Looked at conditioning with humans
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Watson 3 main characteristics of behaviourism
Must be completely objective – rules out any subjective interpretations Not to describe a conscious state but to predict and control overt behaviour Believed that work on animals could tell us about human behaviour
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Little Albert
Albert B – 11 month old boy Conditioned Albert to fear a white rat Generalized to other stimuli
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Conditioned learning
Watson believed conditioned learning could account for all kinds of behaviour E.g. human emotions are conditioned (All except fear, rage and love  innate responses) Conditioned reflex was a model for behaviour Thinking did not involve the brain (it was a muscular act)
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Did Watson believe in nature or nurture?
Watson believed it was environment that was important
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B.F Skinner (1904-1990)
Radical Behaviourism Learning in life requires more than passive acquisition Operant conditioning – modification of behaviour Respondent conditioning – new S-R connections Built on Thorndike’s Law of Effect – relationship between response and reward Skinner Box
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Skinner's operation conditioning
Learning in which voluntary responses come to be controlled by their consequences: Favorable consequences, called “reinforcers”, tend to cause organisms to repeat the behaviors that precede them, and Unfavorable consequences, called “punishers”, tend to discourage behaviors.
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Skinner box
Rats press a lever by accident  dropped food pellet Rewarded for behaviour Reinforcement – behaviour occurs with greater frequency Punishment– causes behaviour to occur less frequency
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What process can be used to teach rats to press on levers?
Shaping
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Project Pigeon
During World War II, the US Navy required a weapon effective against German battleships. Lenses projected an image of distant objects onto a screen in front of each bird. Thus, when the missile was launched from an aircraft within sight of an enemy ship, an image of the ship would appear on the screen. The screen was hinged, such that pecks at the image of the ship would guide the missile toward the ship. project was abandoned
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Air Crib/Heir Conditioner
When Skinner and wife had a baby, Skinner designed this crib Intention to make baby comfortable, confident, mobile, and healthy
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The philosophy of radical behaviourism
Complex behaviour are just chains of simple associations Behaviorism can account for ALL behaviour and human psychology Reinforcement determines behaviour Including language Free will is an illusion?
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Behaviourism: the basics
Behaviorism - “is a theoretical orientation based on the premise that scientific psychology should study observable behavior”. Behavioral theorists view personality as a collection of response tendencies that are tied to various stimulus situations. response tendencies are shaped by classical conditioning, operant conditioning
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Who were the behaviourists?
Ivan Pavlov First observed classical conditioning in dogs. Edward Thorndike Law of Effect: Behaviour depends on consequence (reward/punishment) John Watson Father of behaviorism Conditioning in humans. BF Skinner Operant conditioning – shaping behaviour.
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Problems with behaviourism
Behaviourists wanted to remove mind, consciousness, purpose and cognition from psychology Problem 1: behaviour often does show purpose. Problem 2: Evolutionary constraints on what is learnt Problem 3. Much of human experience is unobservable. Problem 4. It cannot explain a natural language.
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Chomsky's view of language
Children have an innate capacity to learn language “ Language acquisition device”
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The Cognitive Revolution
This new approach, developed in the late 1950s and early 1960s, was directly tied to the development of the computer. Researchers seized on the computer as a model for the way in which human mental activity takes place; the computer was a tool that allowed researchers to specify the internal mechanisms that produce behaviour.
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What is cognition?
Way in which information is processed and manipulated in remembering, thinking, and knowing
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Cognitive Psychology
Approaches seeking to explain observable behavior by investigating mental processes and structures that cannot be directly observed
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Beginning of Cognitive Psychology
George Miller and Jerome Bruner (1950-60s) Developed Center for Cognitive Studies (Harvard) Looked at language, memory, perception George Miller “ The Magic Number 7, plus or minus 2” How accurately can we distinguish stimuli: flash dots Present with series of digits: can recall if 7 or less.
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George Miller - Chunking
Supercalifragilisticexpialidocious: Super Cali Fragi Listic Expi Ali Docious
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Jerome Bruner
Jerome Bruner: Knowing is a process, not a product
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Steven Pinker: Five ideas that made the cognitive revolution
Mind is connected to physical word via concepts of information, computation and feedback Mind is not a blank slate An infinite range of behaviour can be generated by finite combinatorial programs in the mind Universal mental mechanisms can underlie superficial variation across culture The mind is a complex system composed of many interacting parts
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Ideas of the cognitive revolution
Information Processing Inputs and outputs, computation Put a bunch of these together and you get a brain Mind = Brain Mind is real, but it is mechanistic
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Artificial Intelligence
Computer metaphor Storage capacity = memory Programming codes = language Computer programs function same as human mind? Both: - Receive and process large amounts of information Store information Retrieve information
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Alan Turing (1912-1954)
Considered by some as the father of computer science Played a major role in the development of Artificial Intelligence (AI) Created the Turing machine – stores information in memory and has the process (program) to operate on that information Are all other machines (including the brain) mathematically equivalent to this?
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The Turing Test
Test a machine’s capability to demonstrate intelligence Computer may be able to follow instructions/simulate intelligence Turing test - if you can have a conversation with a computer and believe it to be real then it must have some kind of intelligence
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Paradigm shift
Dominant schools of thought about how to study the mind scientifically have changed. Often periods of upheaval, revolution
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2010 - Diederik Stapel
Diederik Stapel, a prolific Dutch social psychologist was investigated for fraud Suspicious behaviour: He often supplied the data to his grad students His grad students working in the lab remarked that stats for different studies showed similar means and SDs After investigation, admitted his fraud and found 25 published papers were based on fabricated data! Eventually 58 papers are retracted
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When was the Open Science Collobaration created?
Formed in 2011 and grew to 27- scientists from over 50 countries
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What was the difference between reported significant effects in original studies and replication studies?
97% of original studies reported significant effects 36% of replications had significant effects in same direction
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Dan Gilbert vs the replicators
so-called replicators are “shameless little bullies” and “second stringers” who engage in tactics “out of Senator Joe McCarthy’s playbook.”
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What are the four methods that create unreliable results?
HARKing Low power P-Hacking Publication Bias
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Publication bias
Journals prefer positive findings 199-2011 104 conference abstracts 54 supported the bilingual advantage 63% got published 50 challenged the bilingual advantage 36% got published
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Harking
Hypothesisng after results are known 1. Generate a hypothesis. “people with messy bedrooms are smarter” 2. Collect some data 3. You found that people with cleaner bedrooms are smarter. 4. Change your hypothesis and publish your paper. Yay!
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P Hacking
Statistical hacks to get a p value <.05 1. Stop collecting data once p<.05 2. Analyze many measures, but report only those with p<.05 3. COllect and analyze many conditions but only report those with p<.05 4. Use covariates to get p<.05 5. Exclude participants to get p<.05 6. Transform the data to get p<.05
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Low power is caused by small sample size true or false
True
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Potential solutions to the replication crisis
Replicate, replicate, replicate Beware of P-Hacking Boost your power Open data, open materials, open analysis Conduct pre-registered confirmatory studies Incorporate open science practices in teaching Insist on open science practices as reviewers Reward open science practices
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Replicate
We have a professional responsibility to ensure the findings we are reporting are robust and replicable Direct / conceptual replications (where possible) should be part of the research pipeline
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Beware p-hacking
p-hacking: Exploring researcher degrees of freedom to find a significant effect Implicit bias or explicit “data manipulation”
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Boost your power
Why are they underpowered? Misunderstanding / lack of appreciation of power Large studies are expensive Large studies are time consuming We need to publish MORE papers, and MORE frequently
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Open data, open materials, open analysis
Make your experimental materials, data, & analysis scripts freely available online Others can easily replicate your work Others can check your data Others can check reproducibility of your analysis
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Francesca Gino
Ex-Harvard Professor Made her data publicly available A graduate student found that the data were too good to be true Found to have falsified data in her research Suspended from Harvard
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What are the key things in a pre-registration?
Hypothesis/Prediction Analysis plan Exclusion criteria
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A good hypothesis/prediction should be...
A good hypothesis/prediction should be Specific and measurable. Based on existing literature and/or preliminary data. Directional if possible
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Analysis plan
Specifiy the independent dependent variables and the statistical test (s) you will use. Different tests can lead to different interpretations. The more tests you run, the higher the chance of finding something 'significant'.
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Registered report "The Gold Standard"
1. Design Study (Stage 1 peer review) 2. Collect and analyze data 3. Write report (Stage 2 peer review) 4. Publish report
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Incoporating open science practices in teaching
Ensure the next-generation of researchers move on from the replication crisis Teach the importance of conducting well-powered studies Encourage critical evaluation of published studies in terms of open science practices