History & Approaches

🧠 History & Approaches to Psychology

Part 1 of 7 — Origins of Psychology

Psychology is the scientific study of behavior and mental processes. It emerged as a distinct discipline in the late 19th century.

Key Milestones

Wundt is considered the "father of psychology" for establishing the first experimental laboratory.

Concept Check 🎯

Early Schools of Thought

Structuralism (Wundt, Titchener)

• Goal: identify basic elements of consciousness
• Method: introspection (trained self-observation)
• Criticism: too subjective, not replicable

Functionalism (William James)

• Goal: understand the purpose of consciousness
• Influenced by Darwin's theory of evolution
• Asked: "How does behavior help us adapt?"
• Led to applied psychology and educational psychology

Gestalt Psychology (Wertheimer)

• "The whole is greater than the sum of its parts"
• Studied perception and how we organize sensory information
• Principles: proximity, similarity, closure, continuity

Applied Recall (exact term answers) ✍️

  1) Who established the first experimental psychology laboratory in 1879?

  2) Which early school of psychology used introspection to identify the basic elements of consciousness?

  3) Which school, founded by William James, focused on the purpose and adaptive function of consciousness?

  Use the exact term from this part.

Fill in the Blanks 🔍

Common Misconceptions and Exam Strategy

  ### Misconceptions to Avoid
  - Wundt is the father of psychology, NOT Freud — Freud founded psychoanalysis but came later.
  - Structuralism and functionalism are NOT the same — structuralism asks "what is consciousness?" while functionalism asks "what is consciousness FOR?"
  - Introspection is NOT the same as simply thinking about yourself — it was a trained, systematic method of reporting conscious experience.
  - Gestalt psychology is NOT about therapy (Gestalt therapy is a different thing) — it's about perceptual organization.

  ### AP Strategy Moves
  - Know the key figures: Wundt (structuralism), James (functionalism), Wertheimer (Gestalt) — the AP exam loves matching researchers to schools.
  - 1879 is one of the most frequently tested dates in AP Psychology.
  - Be ready to compare and contrast the early schools: what each studied, their methods, and their limitations.
  - For free-response, always define the school of thought first, then connect to the specific researcher and method.

Applied Scenarios 🎯

Modern Psychological Perspectives

Biopsychosocial Approach

Modern psychology recognizes that behavior results from the interaction of:

• Biological factors (genetics, brain chemistry)
• Psychological factors (thoughts, emotions, personality)

Research Methods in Psychology

The Scientific Method

1. Observe a phenomenon
2. Form a hypothesis (testable prediction)
3. Design and conduct an experiment
4. Analyze data using statistics
5. Draw conclusions and replicate

Types of Research

Descriptive Statistics

Measures of Central Tendency

Measures of Variability

Normal Distribution

• Bell-shaped curve
• Mean = median = mode
• ~68% of scores within 1 SD of mean
• ~95% within 2 SD
• ~99.7% within 3 SD

Concept Check 🎯

Ethics in Psychological Research

APA Ethical Guidelines

1. Informed consent: participants must know what the study involves
2. Deception: allowed only when necessary, must debrief afterward
3. Confidentiality: protect participants' personal information
4. Right to withdraw: participants can leave at any time
5. Debriefing: explain the true purpose of the study afterward
6. Minimize harm: avoid physical and psychological harm

Institutional Review Board (IRB)

• Reviews all research proposals involving human subjects
• Ensures ethical standards are met
• Weighs potential benefits against risks

Famous Ethical Controversies

Concept Check 🎯

Animal Research Ethics

Research Methods Problem-Solving

Common AP Question Types

1. Identify variables in an experiment (IV, DV, confounds)
2. Choose the appropriate research method for a scenario
3. Interpret statistical results (mean, SD, p-value)
4. Identify ethical violations in research scenarios
5. Distinguish correlation from causation

Practice Scenario

A researcher wants to know if sleep deprivation affects memory. She randomly assigns 40 college students to either a sleep-deprived group (4 hours) or a control group (8 hours), then tests their memory the next day.

• IV: Amount of sleep (4 hours vs 8 hours)
• DV: Memory test scores
• Random assignment: Yes → can establish causation
• Potential confound: Prior sleep habits, caffeine use

Concept Check 🎯

Tips

• Always identify IV and DV first
• Check for random assignment before claiming causation
• Look for confounding variables
• Remember: correlation ≠ causation
• Consider both reliability AND validity

Applied Recall (exact term answers) ✍️

  1) What type of assignment is required to establish a cause-and-effect relationship?

  2) What is the variable that the experimenter manipulates?

  3) What procedure ensures neither participants nor researchers know group assignments?

  Use the exact term from this part.

Fill in the Blanks 🔍

Common Misconceptions and Exam Strategy

  ### Misconceptions to Avoid
  - Random ASSIGNMENT ≠ random SAMPLING. Assignment creates equivalent groups for experiments; sampling selects who participates from the population.
  - Correlation does NOT equal causation — even a strong correlation (r = 0.95) cannot prove one variable causes another without an experiment.
  - A double-blind study is NOT the same as a single-blind study. In single-blind, only participants are unaware; in double-blind, BOTH participants and researchers interacting with them are unaware.
  - A large sample size does NOT fix a biased sampling method — surveying 10,000 people at a gym doesn't represent the general population.
  - Case studies provide depth but NOT generalizability — you can't draw broad conclusions from one person.

  ### AP Strategy Moves
  - When a question describes a study, FIRST identify the IV and DV. The IV is what the researcher manipulates; the DV is what's measured.
  - If the question says "relationship" or "association," think correlational study. If it says "effect" or "cause," think experiment with random assignment.
  - For "reduce bias" questions: experimenter bias → double-blind; participant bias → single-blind; sampling bias → random sampling.
  - Watch for the word "randomly" — random assignment ≠ random sampling, and the AP loves testing this distinction.

AP Psychology: History & Methods Review

Key Comparisons

Concept Check 🎯

AP Exam Tips

• Know the key figures and their contributions
• Be able to design an experiment from a research question
• Understand the difference between correlation and causation
• Know ethical guidelines and famous ethical controversies