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Session Length
~13 min
Adaptive Checks
12 questions
Transfer Probes
6
Psychology is the scientific study of the mind and behavior, encompassing the biological, cognitive, emotional, and social processes that shape how individuals think, feel, and act. Rooted in both philosophy and natural science, psychology emerged as a distinct academic discipline in the late 19th century when Wilhelm Wundt established the first experimental psychology laboratory in Leipzig, Germany, in 1879. Since then, the field has expanded enormously, branching into dozens of subfields including clinical psychology, cognitive psychology, developmental psychology, social psychology, and neuropsychology, each contributing unique methods and insights to our understanding of human experience.
The major theoretical perspectives in psychology offer complementary lenses through which to examine behavior and mental processes. The biological perspective emphasizes the role of genetics, brain structures, neurotransmitters, and evolutionary pressures. The cognitive perspective focuses on internal mental processes such as perception, memory, reasoning, and decision-making. The behavioral perspective, pioneered by John B. Watson and B.F. Skinner, studies observable behavior shaped by environmental stimuli and reinforcement. The psychodynamic perspective, originating with Sigmund Freud, explores unconscious motivations and early childhood experiences. The humanistic perspective, championed by Carl Rogers and Abraham Maslow, emphasizes personal growth, self-actualization, and the inherent goodness of people. Modern psychology increasingly integrates these perspectives, recognizing that behavior is best understood through multiple levels of analysis.
Today, psychology is both a research science and an applied profession with profound real-world impact. Clinical and counseling psychologists treat mental health disorders ranging from depression and anxiety to schizophrenia and personality disorders, using evidence-based approaches such as cognitive-behavioral therapy, psychodynamic therapy, and mindfulness-based interventions. Industrial-organizational psychologists improve workplace productivity and employee well-being. Educational psychologists enhance learning outcomes in schools. Forensic psychologists contribute to the justice system. Health psychologists promote wellness and disease prevention. With the rise of neuroscience technologies such as fMRI and EEG, researchers continue to deepen our understanding of the neural underpinnings of thought, emotion, and behavior, making psychology one of the most dynamic and rapidly evolving scientific disciplines.
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A learning process first described by Ivan Pavlov in which a neutral stimulus becomes associated with a naturally occurring stimulus, eventually eliciting a similar response on its own. This form of associative learning demonstrates how environmental signals can trigger automatic physiological and emotional reactions.
Example: Pavlov's dogs learned to salivate at the sound of a bell after the bell was repeatedly paired with the presentation of food.
A method of learning described by B.F. Skinner in which behavior is modified by its consequences, whether through reinforcement (which increases behavior) or punishment (which decreases it). Operant conditioning explains how voluntary behaviors are shaped by rewards and penalties in the environment.
Example: A child who receives praise for completing homework is more likely to repeat that behavior, while a child who loses screen time for misbehaving is less likely to act out again.
A theory proposed by Leon Festinger describing the psychological discomfort experienced when a person holds two or more contradictory beliefs, values, or attitudes simultaneously. To reduce this discomfort, individuals often change their beliefs, acquire new information, or minimize the importance of the conflicting cognition.
Example: A smoker who knows smoking causes cancer may reduce dissonance by convincing themselves that the health risks are exaggerated or that they will quit soon.
A motivational theory proposed by Abraham Maslow that arranges human needs in a pyramid, from basic physiological needs at the base to self-actualization at the top. According to this model, higher-level needs become motivating only after lower-level needs are substantially satisfied.
Example: A person struggling to find food and shelter is unlikely to focus on creative self-expression or pursuing philosophical fulfillment until those basic survival needs are met.
Developed by John Bowlby and expanded by Mary Ainsworth, this theory describes how early bonds between infants and their caregivers shape emotional development and influence relationship patterns throughout life. Secure attachment in infancy is associated with healthier social and emotional functioning in adulthood.
Example: Ainsworth's Strange Situation experiment showed that securely attached infants explored freely when their caregiver was present but became distressed upon separation and were quickly comforted upon reunion.
A central concept in psychodynamic psychology, referring to mental processes that occur outside of conscious awareness but still influence thoughts, feelings, and behavior. Sigmund Freud proposed that repressed memories, desires, and unresolved conflicts in the unconscious mind drive much of human behavior.
Example: A person who experienced childhood neglect may unconsciously seek excessive reassurance in adult relationships without understanding why they feel persistently insecure.
The brain's ability to reorganize itself by forming new neural connections throughout life. Neuroplasticity allows the brain to adjust to new experiences, learn new information, recover from injuries, and compensate for damage to certain areas.
Example: Stroke patients can sometimes regain lost motor functions through rehabilitation because uninjured parts of the brain can take over the functions previously handled by the damaged area.
Social psychological concepts describing how individuals adjust their behavior to align with group norms (conformity) or comply with demands from authority figures (obedience). Solomon Asch's conformity experiments and Stanley Milgram's obedience studies are landmark demonstrations of these powerful social influences.
Example: In Asch's line experiments, approximately 75% of participants conformed to a clearly incorrect group judgment at least once, demonstrating the power of social pressure.
More terms are available in the glossary.
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