1. Introduction

What this lecture covers

This opening lecture sets up the course itself: what Introduction to Psychology will cover, how it is graded, and why the study of the mind pulls together neuroscience, development, cognition, social behavior, and mental illness. Paul Bloom frames psychology as the study of "us" — how the human mind works — and argues it cannot be understood through psychology alone, since it connects to evolution, economics, philosophy, and other fields.

After watching, you should understand the course's requirements and grading, and have a first sense of the topics ahead: the brain and consciousness, child development, attractiveness, morality, and mental illness, all of which recur across the semester.

Key ideas

• Five branches of psychology: neuroscience (mind via the brain), developmental (how people grow and learn), cognitive (a computational approach to the mind), social (how people act in groups), and clinical (mental health and illness).
• Nature versus nurture: a recurring question in the course is how much of human knowledge and personality is innate versus shaped by culture, language, and parenting.
• Continuity of personality: the course asks whether traits observed in childhood predict the adult a person becomes.
• The physical basis of mind: cases of brain damage, such as a person in a persistent vegetative state, show that mental life depends on a physical brain.
• Phineas Gage: a construction worker whose personality changed after a metal rod passed through his brain, illustrating how brain damage can alter identity and self-control without affecting intelligence or speech.
• Rare neurological syndromes: conditions like Capgras syndrome (believing loved ones have been replaced by impostors) and Cotard's syndrome (believing oneself to be dead) are used to reveal how normal recognition and self-awareness work.
• Course logistics: two lectures a week plus readings, a midterm, a final held on the last day of class, weekly short questions starting in week three, a book review, and an experimental participation requirement.
• Guest lecturers: four Yale faculty will cover cognitive neuroscience of faces, depression, the psychology of food, and love.

Walkthrough

Course requirements and structure (3:40)

Bloom introduces himself and describes the course logistics: two lectures per week, a textbook and a reader, a midterm and a final (held on the last day of class rather than during exam period), weekly pass/fail questions starting in the third week, a short book review, and an experimental participation requirement. He encourages students to attend office hours or introduce themselves after class, noting that a large lecture course can otherwise feel anonymous.

General goals for the course (10:03)

He explains that the course aims to give a state-of-the-art introduction to how the human mind works, approached through psychology's five traditional sub-areas — neuroscience, developmental, cognitive, social, and clinical — plus related fields such as evolutionary biology, economics, philosophy, and anthropology.

Examples of topics: the brain, development, and morality (13:07)

Bloom previews specific topics using vivid cases: brain damage and consciousness (illustrated by a coma patient's brain scan), child development and the nature-versus-nurture debate (illustrated by his own son), computer-generated faces used to study attractiveness, and moral psychology, contrasting examples of cruelty (including Ted Bundy) with examples of moral courage (Oskar Schindler and Paul Rusesabagina).

Mental illness and the value of extreme cases (19:12)

He previews the course's coverage of common disorders like depression and anxiety, then turns to rarer neurological cases: Phineas Gage's personality change after brain injury, multiple personality disorder, Capgras syndrome, and Cotard's syndrome. He argues that studying these extreme, rare cases sharpens understanding of ordinary mental processes, such as the difference between recognizing a face and truly knowing who someone is.

Before you watch

• No prior psychology background is assumed; this is the first lecture of the course.
• Have the syllabus and textbook information handy, since Bloom references specific readings and grading policies.

Check your understanding

1. What are the five traditional sub-areas of psychology, and what does each one focus on?
2. Why does Bloom argue that psychology cannot be studied in isolation from fields like economics or philosophy?
3. What did the case of Phineas Gage reveal about the relationship between the brain and personality?
4. How do rare syndromes like Capgras and Cotard's help researchers understand normal mental processes?