Unit 1 Notes – Psychology’s History, Approaches & Research Methods
Page 1
Unit 1: Scientific Foundations of Psychology
Part I: Psychology’s History & Approaches — Modules 1-3
Part II: Research Methods — Modules 4-8
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Psychology: scientific study of how & why we think, feel, act
Everyday questions (heredity vs environment, cultural behavior, dreams, infant cognition, intelligence vs effort, mood disorders)
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Learning Targets Module 1 (1-1→1-6):
• Psychology as science; “rat is always right”
• Scientific attitude: curiosity, skepticism, humility
• Critical thinking
• Historical development: prescientific to modern
• Early milestones: Wundt, Titchener, James, Hall
• Major schools: behaviorism, Freudian, humanistic
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Scientific Attitude
• Curiosity: testable predictions
• Skepticism: “What do you mean? How do you know?”
• Humility: open to error;
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Critical Thinking: examine assumptions, source, bias, evidence, alternate explanations
Examples debunked (sleepwalking ≠ acting out dreams, no full replay of memories, etc.)
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Prescientific Roots
• Socrates & Plato: mind–body dualism; knowledge innate
• Aristotle: knowledge from experience
• Descartes: innate ideas + animal spirits (nerves)
• Bacon: empiricism; pattern hunger
• Locke: tabula rasa → empiricism
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1879 Wundt: first psychology lab; measured mental “atoms”
Structuralism (Titchener): introspection; unreliable
Functionalism (James, influenced by Darwin): functions of thoughts/feelings; Principles of Psychology 1890
First women: Calkins (APA president 1905), Washburn (first PhD, The Animal Mind)
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Behaviorism (Watson, Skinner): study observable behavior; conditioning
Freudian psychology: unconscious & childhood effects
Humanistic (Rogers, Maslow): growth potential
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Shift from male-dominated field to diverse discipline; increasing women & minority contributions
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Review highlights: psychology = science; structuralism vs functionalism; behaviorism; humanistic; importance of research evidence over common sense
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Cognitive Revolution (1960s): return to mind; cognitive neuroscience links brain ↔ cognition
Psychology defined: science of behavior (observable) & mental processes (internal)
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Nature-Nurture Issue: enduring debate
Darwin natural selection principle
Evolutionary psychology: universal human traits
Behavior genetics: individual differences
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Culture influences behavior; yet fundamental processes universal
Gender: many similarities, some differences (emotion, disorders)
Positive psychology (Seligman): study of human flourishing
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Biopsychosocial approach: integrates biological, psychological, social-cultural factors
Major Perspectives:
• Behavioral
• Biological
• Cognitive
• Evolutionary
• Humanistic
• Psychodynamic
• Social-cultural
Page 18 (Table 2.1)
Each perspective’s focus & sample questions summarized (e.g., Behavioral: learning of fears; Biological: brain ↔ behavior; Cognitive: info processing)
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Basic vs Applied Research
• Basic: build knowledge (bio, developmental, cognitive, etc.)
• Applied: solve problems (I/O, human factors)Helping Professions:
• Counseling psychologists: cope & adjust
• Clinical psychologists: assess & treat disorders
• Psychiatrists: MDs, can prescribe
• Community psychologists: create healthy environments
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Subfields Overview
• Basic: cognitive, developmental, educational, experimental, psychometric, social
• Applied: forensic, environmental, health, I/O, neuropsychology, rehabilitation, school, sportCareer settings: academia, hospitals, business, government, private practice
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Need for Psychological Science
• Limits of common sense: hindsight bias, overconfidence, perceiving order in randomness
• Example biases: lottery wins, game outcomes
Page 42-43
Scientific Method
• Theory ⇒ organized explanation & predicts
• Hypothesis ⇒ testable prediction
• Operational definitions ⇒ precise terms (e.g., sleep-deprived = “X hours less”)
• Replication ⇒ repeating study to confirmResearch Strategies
• Descriptive: case study, naturalistic observation, survey
• Correlational: detect relationships
• Experimental: manipulate variables to determine cause-effect
Page 1
Unit 1: Scientific Foundations of Psychology
Part I: Psychology’s History & Approaches — Modules 1-3
Part II: Research Methods — Modules 4-8
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Psychology: The Scientific Study
Psychology: the scientific study of how and why we think, feel, and act. It employs empirical methods to understand human and animal behavior and mental processes.
Everyday questions psychology addresses include:
The influence of heredity versus environment on development (nature vs. nurture).
How cultural norms shape behavior.
The function and meaning of dreams.
The cognitive abilities of infants.
The interplay between intelligence and effort in achievement.
The causes and treatments of mood disorders.
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Learning Targets Module 1 (1-1→1-6):
Psychology as a science, embracing the principle that " " emphasizing empirical evidence.
The importance of a scientific attitude: curiosity, skepticism, and humility.
The practice of critical thinking in evaluating psychological claims.
Tracing the historical development of psychology from its prescientific roots to modern approaches.
Key early milestones and influential figures: Wilhelm Wundt, Edward Titchener, William James, and G. Stanley Hall.
Understanding the major schools of thought: behaviorism, Freudian (psychodynamic) psychology, and humanistic psychology.
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The Scientific Attitude
Curiosity
: Involves a passion for exploration and understanding, leading to testable predictions and investigations.Skepticism
: A questioning approach that demands evidence; asking "What do you mean? How do you know?" to verify claims rather than accepting them at face value.Humility
: An openness to error and new perspectives, acknowledging that one's own ideas may be wrong. This is encapsulated by the phrase: " " meaning that empirical data should always override personal opinions or prior beliefs.
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Critical Thinking
Critical thinking is a process of disciplined reasoning that involves examining assumptions, scrutinizing the source of information, identifying potential biases, evaluating the evidence presented, and considering alternative explanations for observations or conclusions.
Examples frequently debunked by critical thinking include:
The misconception that sleepwalking is acting out dreams (it's a distinct sleep disorder).
The belief that memories are replayed in full and perfectly accurate detail (memories are reconstructive and prone to error).
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Prescientific Roots of Psychology
Socrates & Plato
: Ancient Greek philosophers who believed in
mind-body dualism
, asserting that the mind and body are distinct entities, and that knowledge is largely
innate
or inborn, existing prior to experience.Aristotle
: Plato's student, who countered that knowledge is not pre-existing but comes from
experience
gained through observation and sensory perception.René Descartes
: A French philosopher who agreed with innate ideas and dualism but also proposed that
animal spirits
(nervous fluid in the brain's cavities) flow through nerves to muscles, enabling movement, foreshadowing the concept of neural pathways.Francis Bacon
: One of the founders of modern science, emphasized
empiricism
—the idea that knowledge should be derived from observation and experimentation. He noted human tendencies like " ", our predisposition to perceive patterns even when none exist.John Locke
: Proposed the concept of
tabula rasa
(blank slate), suggesting that the mind is born empty and experience writes on it, strongly reinforcing the principle of
empiricism
.
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Early Milestones in Psychology's Development
1879 Wilhelm Wundt
: Established the
first psychology laboratory
in Leipzig, Germany. He pioneered the measurement of mental " " – the simplest mental processes, focusing on reaction times to sensory stimuli.Structuralism (Edward Titchener)
: Wundt's student, Titchener, aimed to discover the basic elements (structure) of the mind through
introspection
, a method in which trained subjects would report their immediate sensations, images, and feelings. This method was later found to be unreliable due to its subjective nature and variability across individuals.Functionalism (William James)
: Influenced by Charles Darwin, James focused on the
functions
of thoughts, feelings, and behaviors, rather than just their underlying structure. He explored how mental and behavioral processes enable organisms to adapt, survive, and flourish. His landmark textbook,
Principles of Psychology
, was published in 1890.First Women in Psychology
: Pioneering women struggled for recognition.Mary Whiton Calkins
: A student of James, she was denied a Harvard Ph.D. despite outscoring male students. She later became the
first female president of the American Psychological Association (APA)
in 1905.Margaret Floy Washburn
: The first woman to officially receive a psychology Ph.D. from Harvard (Cornell, 1894). She authored
The Animal Mind
and became the second female APA president.
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Major Schools of Psychological Thought
Behaviorism (John B. Watson, B.F. Skinner)
: Dominant from the 1920s to 1960s, it posited that psychology should only study
observable behavior
, as mental processes were deemed inaccessible. Behaviorists emphasized how behaviors are learned through
conditioning
(e.g., classical conditioning by Ivan Pavlov, operant conditioning by Skinner).Freudian Psychology (Sigmund Freud)
: Also known as the
psychodynamic perspective
, it emphasized the profound influence of
unconscious drives and conflicts
, as well as the lasting impact of
childhood experiences
, on personality and behavior.Humanistic Psychology (Carl Rogers, Abraham Maslow)
: Emerged in the 1960s as a reaction to behaviorism and Freudian theory. It focused on human
growth potential
, self-actualization, free will, and the importance of meeting one's needs for love and acceptance.
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Diversity in Psychology
Over time, psychology has shifted from a predominantly male-dominated field to a much more
diverse discipline
, with increasing contributions from women and minority groups, enriching its perspectives and research areas.
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Review Highlights
Psychology is a rigorous
science
relying on empirical evidence.The foundational debate between
structuralism vs. functionalism
shaped early psychological inquiry.The rise of
behaviorism
redirected psychology toward observable actions.Humanistic psychology
brought focus back to unique human potential.Emphasizes the critical importance of
research evidence
over common sense or intuition.
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Cognitive Revolution (1960s)
The
Cognitive Revolution
marked a significant shift back to studying mental processes, moving away from behaviorism's exclusive focus on observable behavior. This led to
cognitive neuroscience
, an interdisciplinary field that investigates the links between
brain activity and cognition
(e.g., perception, memory, thinking, language).Modern psychology is now broadly defined as the
science of behavior
(anything an organism does, which is observable)
and mental processes
(the internal, subjective experiences inferred from behavior, such as sensations, perceptions, dreams, thoughts, beliefs, and feelings).
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Nature-Nurture Issue
The
Nature-Nurture Issue
is an enduring debate in psychology about the relative contributions of genetic inheritance (nature) and environmental influences (nurture) to an individual's traits and behaviors.Charles Darwin
's principle of
natural selection
(that traits contributing to reproduction and survival are most likely to be passed on) significantly influenced the 'nature' side of the debate.Evolutionary psychology
: Explores the universal human traits and behaviors that have evolved over millennia due to natural selection, focusing on how these adaptations solved ancestral problems.Behavior genetics
: Studies the relative power and limits of genetic and environmental influences on individual differences in behavior and psychological traits.
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Cultural and Gender Influences
Culture
profoundly influences our behavior, beliefs, values, and thinking styles, shaping how we perceive the world and interact within it. However, fundamental psychological processes (like learning, language acquisition) are often
universal
across cultures.Gender
: While there are many
similarities
between genders in psychological functioning, some differences exist, particularly in areas like emotional expression, vulnerability to certain psychological disorders, and social roles.Positive psychology (Martin Seligman)
: A contemporary movement that focuses on the
study of human flourishing
, investigating strengths, virtues, and factors that contribute to well-being and a meaningful life, rather than solely on psychological disorders.
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Biopsychosocial Approach and Major Perspectives
The
Biopsychosocial approach
provides an integrated view, asserting that psychological phenomena are best understood by considering the interplay of
biological factors
(e.g., genes, brain structure, neurochemistry),
psychological factors
(e.g., thoughts, emotions, learned behaviors), and
social-cultural factors
(e.g., societal norms, peer influence, cultural expectations).Major Perspectives in Psychology
(each offers a unique lens for understanding behavior and mental processes):Behavioral
: How we learn observable responses; focus on conditioning and environmental stimuli.Biological
: How the body and brain enable emotions, memories, and sensory experiences; how genes combine with environment to influence individual differences.Cognitive
: How we encode, process, store, and retrieve information; focuses on thinking, perception, and problem-solving.Evolutionary
: How natural selection of traits has promoted the survival of genes; explains universal human characteristics.Humanistic
: How we achieve self-fulfillment and personal growth; emphasizes free will and self-actualization.Psychodynamic
: How behavior springs from unconscious drives and conflicts; stresses early childhood experiences and unresolved issues.Social-cultural
: How behavior and thinking vary across situations and cultures; examines the influence of groups, norms, and social contexts.
Page 18 (Table 2.1)
Each objective’s focus & sample questions summarized (e.g., Behavioral: how do we learn to fear particular objects or situations?; Biological: how are messages transmitted in the body? How is blood chemistry linked with moods and motives?; Cognitive: how do we use information in remembering? Reasoning? Problem-solving?).
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Research and Applied Fields in Psychology
Basic vs. Applied Research
:Basic Research
: Pure science that aims to increase the scientific knowledge base. Examples include
biological psychology
(brain-behavior links),
developmental psychology
(age-related behavioral changes),
cognitive psychology
(mental processes),
experimental psychology
(research methods),
psychometric psychology
(measurement of abilities, attitudes, traits), and
social psychology
(how we interact with others).Applied Research
: Scientific study that aims to solve practical problems. Examples include
industrial-organizational (I/O) psychology
(applying psychological concepts to optimize workplaces) and
human factors psychology
(focusing on the interaction of people, machines, and physical environments).
Helping Professions
:Counseling psychologists
: Assist people with problems in living (often related to school, work, or marriage) and in achieving greater well-being; they help people cope and adjust.Clinical psychologists
: Assess and treat mental, emotional, and behavioral disorders. They provide psychotherapy.Psychiatrists
: Are medical doctors (MDs) who specialize in treating psychological disorders and
can prescribe medications
, unlike most psychologists.Community psychologists
: Work to create healthy physical and social environments for all, focusing on promoting well-being and preventing disorders, often through public policy and community programs.
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Subfields and Career Settings
Basic Research Subfields
(focus on building knowledge):Cognitive psychology: Studies thinking, perception, language, memory.
Developmental psychology: Studies physical, cognitive, and social change throughout the life span.
Educational psychology: Studies how psychological processes affect and enhance teaching and learning.
Experimental psychology: Investigates basic behavioral and mental processes through experimental methods.
Psychometric and Quantitative psychology: Studies measurement of human abilities, attitudes, and traits, and designs, analyzes, and interprets research data.
Social psychology: Studies how we think about, influence, and relate to one another.
Applied Research Subfields
(focus on solving practical problems):Forensic psychology: Applies psychological principles to legal issues.
Environmental psychology: Studies interactions between individuals and their natural and built environments.
Health psychology: Focuses on health promotion and disease prevention.
Industrial-organizational (I/O) psychology: Applies psychological methods to optimize human behavior in workplaces.
Neuropsychology: Studies the relationship between neurological processes and behavior.
Rehabilitation psychology: Works with people who have lost optimal functioning after an event.
School psychology: Addresses psychological factors that affect learning and behavioral issues in educational settings.
Sport psychology: Studies the psychological factors that influence and are influenced by participation in sports.
Career settings
for psychologists are diverse and include academia (universities, colleges), hospitals and clinics, business organizations, government agencies, and private practice.
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The Need for Psychological Science
Psychological science is essential because
common sense
often leads us astray due to cognitive biases and limitations in human intuition.Limits of Common Sense
:Hindsight Bias
: The " " phenomenon; the tendency to believe, after learning an outcome, that one would have foreseen it. It makes outcomes seem inevitable and obvious in retrospect, hindering our ability to learn from mistakes.Overconfidence
: Our tendency to overestimate the accuracy of our beliefs and judgments, often leading us to feel more certain than we are. This can lead to errors in prediction and decision-making.Perceiving Order in Randomness
: The human tendency to find patterns or meaning in random sequences, even when none exist, making us prone to superstitions or misinterpreting chance events.
Example Biases
:The mistaken belief that lottery wins are predictable.
The illusion that one can predict the outcomes of games of chance through skill or pattern recognition.
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The Scientific Method and Research Strategies
The Scientific Method
is a self-correcting process for evaluating ideas with observation and analysis. Key components include:Theory
: An organized, comprehensive explanation that integrates observations and predicts behaviors or events. A good theory effectively summarizes and simplifies observations, and provides clear predictions that can be tested.Hypothesis
: A specific, testable prediction, often derived from a theory; it is a statement about the relationship between two or more variables.Operational Definitions
: Precise statements of the exact procedures (operations) used to define research variables. For example, " " might be operationally defined as " " This allows for replication and consistent measurement.Replication
: Repeating the essence of a research study, usually with different participants in different situations, to see whether the basic finding extends to other participants and circumstances. Replication is crucial for confirming results and building confidence in scientific findings.
Research Strategies
(different approaches to gather data and answer research questions):Descriptive Research
: Aims to describe behaviors, often through case studies, surveys, or naturalistic observations.Case Study
: A detailed examination of an individual or small group. Provides rich, in-depth data but may not be generalizable to a larger population.Naturalistic Observation
: Observing and recording behavior in naturally occurring situations without manipulating or controlling the situation. Provides realistic data but lacks control over variables.Survey
: Gathers self-reported attitudes or behaviors from a representative sample of people, often through questionnaires or interviews. Can collect data from large populations quickly but is subject to social desirability bias and inaccurate self-reporting.Correlational Research
: Detects naturally occurring relationships between variables. It allows for prediction but
does not imply causation
(correlation \neq causation).Experimental Research
: Manipulates one or more factors (independent variables) to observe the effect on some behavior or mental process (dependent variable), while controlling other relevant factors. This is the only type of research that can determine
cause-effect relationships
.