Psychology as a Science Flashcards
What is Science in Psychology?
What is being studied.
The method of research used.
And the extent that those are scientific.
The Scientific Method (The Scientific Cycle of Inquiry)
1) Theory: From past scientifically credible research
2) Hypthosis: Falsifiable statement which can show reductionism.
3) Testing against Reality: Empiricism. The idea that knowledge comes from our senses.
4) Strength of Results: Limitations like R and O
5) Amending the theory based on findings or developing a new theory.
Popper
The Hypoethtico Deductive Model of Reasoning:
- Testing a theory of scientific knowledge
- We need to falsify hypotheses, not prove them true because knowledge about ‘what is’ can never be proved.
- Science does not use rational arguments but when something is known then logical deductions can be made.
Methodology (Is and Is Not a Science)
+ Lab Experiments: Quant Data (brain scans) Objective. Reliable. Limited bias and measurable (Bandura/Milgram)
-Case Studies and Field Experiments: Qual Data. Susceptible to bias and low R
(Phineas Gage: No baseline measure before the accident and data from those who knew him. Couldn’t go back to work and concluded that brain damage had an effect. He got another job and did it well so no change)
Unified Paradigm
Model, Theory or Area that follows the same principles
Unified Paradigm (Is and Is Not a Science)
+Psychologits all want to explain and predict human behaviour
-There is a lack of paradigm in explaining different areas of psych (Bio states agg could come from evolution or brain structure)
Objectivity
All sources of bias are minimized. Subjective ideas are eliminated. In pursuit of science, facts will speak for themselves, even if they turn out to be different from what the investigator hoped.
Objectivity (Is and Is Not a Science)
+Quant methods operationalise concepts to measure them. Inter-rater observations minimise bias (In Bandura, 20 min observation through a one-way mirror. 5-second intervals. 240 response units for each child. Inter-rater reliability was 0.89. So agreed on behaviour removing subjectivity)
-Humans studying humans can never be objective (Case Studies. Psychologist knows there subjects well. Luke and Agoha, spent time with Amy gathering details on her life, cause and family. Subjectivity in looking for improvements=researcher bias)
Falsification
Proved as false not true.
Falsification (Is and Is Not a Science)
+Approaches that are more scientific (Bio) have methods that are easier to falsify (Alpers. The localized tumour was said to be the cause of his outbursts)
- Easy to find supporting studies and the psychodynamic approach cannot be falsified (Concepts in Freud’s theory are not measurable so cannot be rigorously tested. Unconscious is unreachable and concepts studied lack scientific credibility as they are immeasurable. Cannot be falsified)
Replication
- Ability to accurately reproduce something correctly, such as the procedure of a study in order to test for consistency.
- Reliable if it is well-designed with SP that can be replicated accurately.
- Unreliable if the researchers make on-the-spot decisions, use imagination or bring personal bias
Replication (Is and Is Not a Science)
+ Lab experiments use high control and standardised procedures that can be easily replicated(Baddeley improved the reliability of his own study by getting rid of the read-aloud word lists as some participants had hearing difficulties and replacing them with slides. Everyone saw the same word for the same amount of time, 3s)
- Some methods are more complex that cannot be standardised (Clinical interviews need to be tailored to allow a patient to fully divulge symptoms. No standardisation so no repetition as every clinician is different with a different body of knowledge)
Control
A variable that is kept the same throughout the experiment.
Control (Is and Is not a Science)
+Lab Experiments have standardised procedures.
-Observations have EVs that aren’t always identifiable and controllable, control limits and realism. They have no control as they are just observing and not manipulating.
Predictions
A hypothesis that is formed based on an assumption of what will happen is what is tested to get disproved.
Predictions (Is and Is Not Science)
+Theories can leas to real life predictions (CC works in advertising. CC is used to make people buy the products, using an association with the product and a better feeling/outcome for their lives. For example, many beer ads prominently feature attractive young women wearing bikinis. The young women (US) naturally elicit a favourable, mildly aroused feeling (UR) in most men. The beer is simply associated with this effect)
-Too general for precision (Szh has dopamine and social causation as hypotheses for its cause. No definitive cause as neither can prove the condition completely)
Generalisation
Applying a behaviour or conclusion to a wider population
Human Generalisation (Is and Is Not Science)
\+Random Sampling methods like stratified sampling can help eliminate bias that would prevent generalisability. -Studies conducted before the 1970s often had samples of white middle-class males from the USA (Milgram had a sample of 40 is quite large, but anomalies might spoil the results) and current studies use volunteers which can also cause problems (Volunteers are likely to be particularly obedient so are not acting naturally. Loftus and Palmer used student volunteers who are not exactly applicable to the wider population as their motivations may be different)
Animal Generalisation (Is and Is Not Science)
+The process of Evolution has led to similar traits with rats having similar CNS to humans
(Evolution is widely accepted by scientists. Implies that we can learn from the behaviour of animals and draw conclusions about human behaviour. Few scientists deny this. Rats and humans share 95% of DNA)
-Evoluntariy discontinuity for animals being further along and living in different environments (Despite evolutionary similarities, cannot generalise from the animal because our thought processes and behaviours are too different. All animal studies are “low-quality research” and fail Bateson’s decision-making cube test)
Validity
Refers to a test’s ability to measure what it is supposed to measure.
Validity (Is and Is Not a Science)
+Lab Experiments are more objective and free from bias with the ability to establish cause and effect (Meltzer looked into the effectiveness of drug treatments for Szh. Found that drug gave significant improvements in functioning compared to the placebo group. Improvements were due to drug and not EVs)
-DCs can cause bias as well as other and there are other forms like Researcher bias which can come when they are analysing qual data (Authoritarian Personality and Accquenstice Bias: Possible to get a high score just by ticking the same line of boxes down. People who agree with the items on the F-scale are therefore not necessarily authoritarian but ‘acquiescers’ and the scale is just measuring the tendency to agree to everything.)
Reductionism
Reductionism means reducing everything to the simplest possible explanation: bare physical facts, numbers, the brain. It involves taking things apart and looking at what they’re made of but missing out on the bigger picture.
Holism
Holism refers to any approach that emphasizes the whole rather than their constituent parts. ‘the whole is greater than the sum of its parts’.
Reductionism/Holism (Is and Is not a Science)
+Reductionsim makes concepts measurable (Milgram operationalised obedience into volts when obedience in real life is far more complex and includes multiple factors can’t be operationalised)
-Holism is less measurable and consequently less scientific (Eysenck combines biological and social factors. Personality is determined by biological constitution, which, in turn, is determined by genes. These genetic factors exert their effects under the influence of environmental/social factors. Relies heavily on the self-report measures of personality)