Introduction to Psychology: Perspectives, Methods, and Research

Introduction to Psychology

Historical Background

Psychology originated as a branch of philosophy, with ancient Greeks contemplating the mind. The formal beginning of psychology as a science occurred in the late 19th century.

• Wilhelm Wundt: Established the first psychology lab in 1879, focusing on building blocks of the mind (structuralism) and using introspection (systematic observation of one's own conscious experience).

Theoretical Perspectives in Psychology

Structuralism

Structuralism aimed to understand the structure and characteristics of the mind through introspection.

• Wilhelm Wundt and E.B. Titchener: Credited as founders.

• Emphasized systematic observation to study consciousness.

Functionalism

Functionalism focused on the purpose of cognitive processes and how they help individuals adapt to their environment.

• William James: First American psychologist, established functionalism.

• Examined the mind's functions and their behavioural outcomes.

• Influenced by the theory of natural selection.

Psychoanalytic Perspective

Psychoanalysis emphasizes the influence of unconscious processes on behaviour.

• Sigmund Freud: Founder.

• Studied hysteria and neurosis.

• Proposed that much of patients' problems arose from unconscious mind.

• Techniques: accessing unconscious through dream analysis.

• Emphasized the role of unconscious and early childhood experiences.

Behaviourism

Behaviourism focuses on observable behaviour and its control.

• John B. Watson: Major advocate.

• Rejected introspection; believed only observable behaviour should be studied.

• Important in behavioural therapy and cognitive-behavioural therapy (CBT).

Cognitive Perspective

The cognitive perspective studies mental processes underlying thinking, memory, and interpretation.

• Jean Piaget and Noam Chomsky: Key figures.

• Emphasizes that thinking affects our behaviour (not just reward/punishment).

Other Perspectives

• B.F. Skinner: Studied operant conditioning, focusing on reinforcement and punishment as major factors in behaviour.

• Women in Psychology: Faced social prejudice, exclusion from graduate programs, and underrepresentation in faculty positions.

Scientific Method in Psychology

Overview

The scientific method is a systematic way of learning about the world through observation, developing theories, and making predictions.

• (1) Identify question of interest

• (2) Formulate explanation

• (3) Carry out research to support/refute

Scientific Theory

• A theory is an explanation for a large number of findings in the natural world.

• Hypothesis: A testable prediction about processes that can be observed and measured.

• Hypotheses must be falsifiable (able to be proven false).

• Example: Bystander effect hypothesis – the more people present at the scene of an accident, the longer the response time will be.

Bias Awareness

• Confirmation bias: Tendency to seek out evidence that supports our hypothesis and neglect or distort contrary evidence.

• Belief perseverance: Tendency to stick to our initial belief even when evidence is contradictory.

Psychological Pseudoscience

Pseudoscience involves claims that seem scientific but lack defences from bias and scientific evidence.

• Emotional reasoning fallacy: Using emotions rather than evidence.

• Bandwagon fallacy: Believing something is true because many people believe it.

• Not me fallacy: Believing others have biases, but not oneself.

• Opportunity cost: Investing time, energy, or effort into questionable treatments.

• Direct harm: Some treatments can cause direct harm to those who receive them.

Critical Thinking

• Key to scientific method: evaluating claims open-mindedly and carefully.

• Thinking critically = thinking scientifically.

• Not intuitive; requires overcoming biases.

Modern Psychology: Types and Branches

Experimental Psychology

• Focuses on research and laboratory studies.

Clinical Psychology

• Assessment, diagnosis, and treatment of psychological disorders.

• Science-practitioner model.

Other Branches

• Neuropsychology

• Social/personality psychology

• Forensic psychology

• Child/developmental psychology

How Psychology Affects Our Lives

• Basic research: examines how the mind works.

• Applied research: utilizes findings to solve real-world problems.

Research Methods in Psychology

Facilitated Communication

A controversial and scientifically discredited technique where a facilitator provides physical support to a non-speaking person, enabling communication via pointing or typing.

Research Questions

• Come from common sense assumptions, observations in the real world, solving real-world problems, or understanding how something works.

Populations vs. Samples

• Population: Entire group of people of interest.

• Sample: Smaller group drawn from the population.

• Random selection: Key for generalizability; ensures each person has an equal chance of being selected.

Operational Definition

• Translating research questions into specific, testable procedures that can be measured or observed.

• Example: Studying aggression in children.

The Methods Toolbox

Naturalistic Observation

Watching behaviour in a natural/real-world setting.

Advantages	Disadvantages
High external validity (generalizable) Rich, detailed information Sometimes the only possible option	Lack of control Time and resource consuming Observer bias Cannot draw cause & effect conclusions

Example: Observing university students using laptops in class for non-class related reasons.

Case Study

An in-depth analysis of a single person or setting, including detailed descriptive accounts of behaviour, history, and other factors.

• Qualitative data: Common when studying rare, unusual, or noteworthy phenomena.

Advantages	Disadvantages
Rich, detailed descriptions and data Sometimes the only possible method	Low external validity Researcher bias

Example: Brain injuries, medical/clinical diagnosis, rare diagnosis.

Self-Report Methods

Collecting data via asking participants to describe their own behaviours, attitudes, views, perceptions, etc.

• Issues: Assumption that people answer honestly and provide meaningful responses.

• Problems: Careless/random responding, misunderstanding questions, social desirability bias.

• Social desirability bias: Tendency to respond inaccurately to present oneself in a positive light.

Reliability and Validity

• Reliability: Consistency of measurement.

• Test-retest reliability: Consistency across time points.

• Inter-rater reliability: Consistency across different raters.

• Validity: Extent to which a measure assesses what it claims to measure.

• High validity: The measure accurately reflects the intended construct.

Example: Feline pet preference scale (Likert scale items).

Correlational Research

Examining Relationships Between Variables

• Variables are observed, not manipulated.

• Correlation coefficient range: $-1.0$ to $+1.0$ (positive, negative, or zero).

• Higher values mean stronger relationship.

Example: Relationship between texting speed and relationship drama; video games and aggression.

Correlation vs. Causation

• Correlation does not imply causation.

• Many possible explanations: A → B, B → A, A ↔ B.

• Determining causation is only possible through experimentation.

Third Variables/Confounds

• A third variable can influence both variables, creating a false or misleading association.

• Example: Kids with dogs are happier than kids without dogs – is there another variable?

Pros and Cons of Correlational/Non-Experimental Designs

Advantages	Disadvantages
Can establish trends across large amounts of data Good for describing behaviour Some best to use for ethical reasons	Cannot infer causal direction Third-variable problem (confounding variable)

Experimental Research

Experimental Design

• Research designs that focus on determining causal influence between variables.

• At least one variable is manipulated, one is measured or observed.

• Random assignment of participants to experimental or control group.

• Independent variable (IV): Manipulated by researcher.

• Dependent variable (DV): Affected by changes in IV; measured by researcher.

Internal and External Validity

• Internal validity: How well a study is designed and conducted.

• External validity: Degree of certainty that the IV caused changes in the DV.

• Confounding variable: Variable not accounted for that could provide an alternative explanation.

Stanford Marshmallow Experiment

• Delay of gratification test with preschoolers.

• Results: Preschoolers' delay times were significantly affected by experimental conditions.

• Long-term outcomes: SAT scores, positive functioning, BMI, etc.

Pitfalls of Experiments

• Expectancy effect: Changes in participants' behaviour caused by expectations of researcher/observer.

• Demand characteristics: Cues in research setting that lead participants to guess the study's purpose and adjust behaviour accordingly.

Ethical Guidelines for Human Research

• Informed consent

• Protection from harm and discomfort

• Deception and debriefing

Summary Table: Research Methods

Method	Advantages	Disadvantages
Naturalistic Observation	High external validity, rich data	Lack of control, observer bias
Case Study	Rich, detailed data	Low external validity, researcher bias
Self-Report	Efficient, easy to administer	Social desirability bias, misunderstanding
Correlational	Describes relationships, large data sets	Cannot infer causation, confounds
Experimental	Can infer causation, control	May lack external validity, ethical limits

Key Terms and Concepts

• Introspection: Systematic observation of one's own conscious experience.

• Structuralism: Study of the structure of the mind.

• Functionalism: Study of the purpose of mental processes.

• Psychoanalysis: Study of unconscious processes.

• Behaviourism: Study of observable behaviour.

• Cognitive Psychology: Study of mental processes.

• Validity: Accuracy of a measure.

• Reliability: Consistency of a measure.

• Correlation coefficient: $r$ value indicating strength and direction of relationship.

• Independent variable (IV): Manipulated variable in experiment.

• Dependent variable (DV): Measured outcome in experiment.

Additional info: Some explanations and examples have been expanded for clarity and completeness based on standard introductory psychology textbooks.