Psychology study guide
This guide is designed to help you understand the core ideas that commonly appear in introductory college Psychology courses. Read the explanation, follow the example, then try the practice questions without looking back. The goal is to understand the reasoning—not just memorize an answer.
Course requirements vary by school and instructor. Use this as a learning and review resource alongside your assigned textbook, lectures, and instructor guidance.
Research methods
Concept: Psychology uses systematic observation to test ideas. Experiments manipulate an independent variable and measure a dependent variable while controlling alternatives; random assignment supports causal inference. Correlational studies measure relationships but do not by themselves establish causation.
Worked example: To test whether sleep affects quiz performance, researchers might randomly assign participants to different sleep conditions and compare quiz scores, while controlling other factors.
Remember: Operationally define variables; distinguish random sampling from random assignment; correlation is not causation.
Common mistakes: Claiming causation from a survey; confusing independent and dependent variables; ignoring confounds.
Practice it
- Identify IV and DV in a caffeine-and-reaction-time experiment.
- Why is random assignment useful?
- Can a correlation prove causation?
Learning & memory
Concept: Learning is relatively lasting change from experience. Classical conditioning links stimuli, operant conditioning links behavior with consequences, and observational learning occurs by watching others. Memory involves encoding, storage, and retrieval, with working and long-term systems serving different roles.
Worked example: If a student studies vocabulary with spaced retrieval over several days, repeated effortful recall strengthens later access more effectively than one long rereading session.
Remember: Spacing and retrieval practice aid learning; reinforcement increases behavior; memory is reconstructive, not a perfect recording.
Common mistakes: Equating punishment with reinforcement; assuming rereading equals mastery; treating memory errors as always intentional.
Practice it
- What is positive reinforcement?
- Why does retrieval practice help memory?
- Classical vs operant conditioning: what is learned?
Development
Concept: Developmental psychology studies change across the lifespan in physical, cognitive, social, and emotional domains. Development reflects interactions among biology, experience, and context. Researchers use longitudinal and cross-sectional designs to study age-related patterns.
Worked example: A longitudinal study may follow the same children for years to track language growth; a cross-sectional study compares different age groups at one time.
Remember: Development continues across lifespan; age trends are not destiny; design affects what conclusions are possible.
Common mistakes: Treating stage theories as exact for every person; confusing cohort differences with age effects; assuming development ends in adulthood.
Practice it
- Longitudinal vs cross-sectional: what differs?
- Give one domain of development.
- Why can cohort effects matter?
Sensation & perception
Concept: Sensation is detection of physical energy by sensory receptors; perception is the brain’s organization and interpretation of that input. Attention, context, expectations, and prior experience can influence what is perceived.
Worked example: The same ambiguous image can be interpreted differently depending on surrounding cues, showing that perception involves more than raw sensory input.
Remember: Sensation and perception are related but distinct; thresholds describe detection; top-down processing uses expectations/context.
Common mistakes: Assuming perception is a camera-like copy; confusing absolute threshold with difference threshold; ignoring attention.
Practice it
- Define sensation vs perception.
- What is top-down processing?
- Why can context change perception?
Personality
Concept: Personality refers to relatively enduring patterns of thought, emotion, and behavior. Trait approaches describe dimensions such as the Big Five, while other perspectives emphasize learning, cognition, biology, or unconscious processes. Good assessment requires reliability and validity.
Worked example: A trait score describes a tendency, not a guarantee that someone behaves the same way in every situation. Context still matters.
Remember: Traits are continuous dimensions; reliability is consistency; validity concerns whether a measure captures what it claims.
Common mistakes: Using personality labels as fixed destinies; confusing reliability with validity; diagnosing from a casual quiz.
Practice it
- What does reliability mean?
- Why can situation still matter when traits are stable?
- Name one Big Five trait.
Social psychology
Concept: Social psychology studies how people think about, influence, and relate to others. Topics include conformity, obedience, attitudes, group behavior, attribution, prejudice, and helping. Situational forces can strongly shape behavior.
Worked example: If everyone in a group publicly favors one answer, a person may conform even when privately uncertain. The effect can depend on unanimity, group size, and social stakes.
Remember: Separate person and situation explanations; group norms influence behavior; correlation in social data does not automatically show cause.
Common mistakes: Explaining behavior only by personality; overgeneralizing classic studies; ignoring culture and context.
Practice it
- What is conformity?
- Give a situational factor that can affect behavior.
- What is an attribution?