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Lecture notes: Introduction to physchology and Research Methods
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What disciplines are related to psychology?
Sociology → social roles & forces
Anthropology → culture & traditions
Biology → biochemical processes
Medicine → health behaviours & attitudes
Psychiatry → psychological disorders/problems
Business → groups, morale & human factors
Computer Science → AI & information systems
Law → forensic psychology
Literature → personality & human expression
Where did psychology come from?
Psychology developed from the combination of philosophy + physiology, eventually becoming a modern scientific and professional discipline.
Key shift:
Philosophical speculation → systematic scientific study
What is psychology?
The scientific study of behaviour, mind, thinking, feeling, and reactions to stress.
Psychology considers biological, mental, environmental, sociocultural, and other influences.
James (1890): psychology is the science of mental life.
Plato — Theory of Forms
Believed there are universal patterns/forms behind things we experience.
More abstract forms were considered more real.
Influenced the search for universal truths in science.
Descartes — Mind-Body Dualism
Two different worlds of existence:
Body:
Physical
Takes up space
Determined by physical processes
Mind:
Not physically located
Has intentionality & free will
Considered capable of existing beyond the body
Locke — Empiricism & Tabula Rasa
Empiricism: knowledge comes through sensory experience.
Tabula rasa: we are born like a blank slate and experience writes/“fills” our knowledge.
Simple ideas → complex ideas
Emphasized individualism, liberty, and democracy.
Kant — Rationalism
Rationalism: knowledge comes from the correct use of reason.
Some structures/processes of knowledge are a priori (existing before experience).
We have innate processes/templates that help us understand the world.
Locke vs. Kant:
👉 Locke = experience
👉 Kant = reason + innate structures
Wundt — Beginning of scientific psychology
1879: established the first psychological laboratory in Leipzig.
Studied consciousness/immediate experience scientifically.
Used experimental self-observation (introspection).
Studied things like reaction time, sensation, perception, memory, attention, and thinking
What is introspection?
introspection = systematic self-observation.
Participants were placed in standardized, repeatable situations and reported simple, measurable experiences.
Important: Psychology moved away from casual observation/speculation toward systematic experimental study.
What is Freudianism?
Freudianism = ideas associated with Sigmund Freud and psychoanalysis.
Key ideas:
Much behaviour is influenced by the unconscious mind.
Early childhood experiences can influence later behaviour.
People may have unconscious conflicts/desires.
Freud emphasized the role of unconscious processes in understanding thoughts, feelings, and behaviour.
Think: Freud → unconscious + childhood + psychoanalysis
What is Völkerpsychologie?
Wundt's study of psychology through culture and history.
Focused on:
Language
Religion & myths
Customs
Shared worldview of a social group
Volkgeist = “folk mind” / group mind — the idea that a group has a collective psychological character.
Basic vs. Applied Psychology
Basic psychology:
→ seeks knowledge and understanding of psychological processes.
Applied psychology:
→ uses psychological knowledge to address real-world problems.
Think:
Basic = understand
Applied = use
Natural Science vs. Human Science
Natural Science:
Looks for general laws
Uses quantitative methods
Attempts to predict/control behaviour
Often uses experiments
Human Science:
Seeks to understand human experience
Focuses on individual/social context
Often qualitative
Uses narratives and lived experiences
Dilthey: both approaches are valuable.
What are major schools/areas of psychology?
Structuralism
Functionalism
Behaviourism
Gestalt
Humanism
Cognitive
Developmental
Social
Personality
Cultural
Psychoanalysis/Freudianism
Why is psychology considered a science?
Psychology developed by moving from philosophical speculation and common sense toward systematic observation, experimentation, and evidence.
Psychologists study:
Sensation & perception
Memory & attention
Thinking
Emotion
Behaviour
Social interactions
What are theory, hypothesis, and falsifiability?
Theory: an organized system of ideas used to explain a phenomenon.
Hypothesis: a specific statement that describes/explains a phenomenon; usually derived from a theory and used to test it.
Falsifiability: a hypothesis must be potentially testable/falsifiable to be scientific.
What is an operational definition?
A statement of how a phenomenon will be observed and recorded.
Provides a standardized way of measuring it.
What are the main types of measures?
Self-reports: interviews, questionnaires, diaries.
Behavioural observations: counting/coding behaviour.
Bio-physiological measures: heart rate, blood pressure, brain waves/scans.
Archival records: medical, school, government records, newspapers.
What are self-reports and surveys?
Self-reports: people provide their own answers about themselves.
Quick/easy and can reveal inner feelings, but may be inaccurate or influenced by wanting to “look good.”
Surveys: collections of questions by phone, internet, or paper.
Open-ended → qualitative responses
Coded → responses are tallied and analyzed statistically
What are behavioural, bio-physiological, and archival measures?
Behavioural: directly count/code behaviour; may be more objective, but behaviour may change when observed.
Bio-physiological: measure physical processes such as heart rate, blood pressure, brain waves/activity.
Archival: use existing records; may be incomplete or lack the exact information needed.
Laboratory vs. naturalistic observation
Laboratory research:
Controlled setting → greater precision/standardization.
May cause reactivity → participants change behaviour because they are being studied.
Naturalistic observation:
Everyday, natural setting → more natural behaviour.
Less control and may have observer bias.
What is participant observation?
Researcher is both an observer and a participant in the setting.
May influence people's behaviour/results.
Advantage: provides an “insider” perspective.
What are qualitative studies and case studies?
Case study: detailed, in-depth analysis of a specific person or group.
Provides a rich description of their life/conditions.
May not generalize to everyone, but can reveal patterns or qualities people share.
What are populations and samples?
Population: a very large group of individuals being studied; usually diverse rather than homogeneous.
Sample: a smaller group taken from the population.
Main concern: Is the sample representative of the population?
What are psychological tests/inventories?
Used to measure/evaluate abilities, traits, interests, values, etc.
Objective tests:
Produce numerical scores/subscores.
Example: IQ tests
Projective tests:
Designed to assess unconscious feelings or motives.
Examples: TAT and inkblot tests
What are reliability, validity, and standardization?
Standardized: same procedure for giving/scoring the test, often using reference norms.
Reliability: how consistent scores are when the same person takes the test twice.
Validity: whether the test actually measures what it is intended to measure.
What are correlational studies?
Examine how two or more variables are associated.
Positive correlation: both variables move in the same direction. ↑↑ / ↓↓
Negative correlation: variables move in opposite directions. ↑↓
No correlation: no consistent relationship.
⚠ Correlation does NOT establish causation.
What are experimental studies and variables?
experimental studies: used to make inferences about cause and effect.
Independent Variable (IV): manipulated/changed by the researcher.
Dependent Variable (DV): resulting behaviour/condition being measured.
Experimental group: receives the treatment/manipulation.
Control group: receives placebo, waitlist, time-out, or distractor.
Random assignment: helps control extraneous variables.
What are placebo effects, experimenter effects, and blinding?
Placebo effect: a person believes they received a real treatment but actually received an inert/sham treatment.
Experimenter bias: unconscious influence of the researcher on study outcomes.
Single-blind: participant doesn't know whether they received treatment.
Double-blind: neither participant nor experimenter knows who received treatment.
What are descriptive/inferential statistics and research ethics?
Descriptive statistics: summarize data.
Mean: average
Median: middle score
Mode: most frequent score
Range: highest − lowest
Standard deviation: how spread out scores are around the mean
Inferential statistics: use data to make educated guesses/inferences about results and chance.
Null hypothesis: assumes no difference between groups.
t-test: compares means of 2 groups.
Statistical significance: commonly p ≤ .05.
ANOVA: examines differences involving multiple influences/groups.
Ethics: considers what is right/wrong in research. Important examples include Milgram's obedience experiment and the Stanford Prison Experiment.