Introduction to Psychology and Research Methods

Psychology is the scientific study of behavior and mental processes.
There is a primary distinction between a Psychologist and a Psychiatrist.
Psychologists typically hold a PhD (Doctor of Philosophy) or a PsyD (Doctor of Psychology), focusing on clinical practice, applied fields, or research.
Psychiatrists are Medical Doctors ( $MDs$ ) who specialize in psychiatry and hold the authority to prescribe medication.

Philosophy: Classical foundations from Plato and Aristotle led to concepts like John Locke's "tabula rasa" (blank slate) and Thomas Hobbes' focus on experience.
Physiology: Early research into the nervous system, such as Luigi Galvani's work with frogs, contributed to the biological understanding of behavior.
Structuralism: Established by Wilhelm Wundt in $1879$ in Leipzig, Germany, which is often considered the birthday of psychology. This school viewed the mind as "mental chemistry," breaking it into elements via "introspection." Edward Titchener brought these ideas to Cornell University.
Functionalism: Influenced by Charles Darwin and evolutionary theory, this school focused on the function of the mind in adaptation. Key figures include John Dewey and William James, who published the foundational textbook Principles of Psychology in $1890$ .
Behaviorism: Founded by John Watson and advanced by B.F. Skinner, this school argued that psychology should ignore the mind and focus exclusively on observable behavior.

The Four Goals: Describe, Explain, Predict, and Control behavior and mental processes.
Applied Research: Focused on solving specific problems, including fields like Industrial and Organizational ( $I/O$ ) psychology and Human Factors (human-machine interface).
Pure/Basic Research: Conducted to gain knowledge for its own sake.

Naturalistic Observation: Observing behavior in real-world settings without interference, exemplified by Jane Goodall's primate research.
Surveys: Useful for gathering large amounts of data, though susceptible to biases such as framing (the way a question or context is presented).
Personal Interview: One-on-one sessions that allow for detailed communication but are subject to interviewer bias.
Psychological Tests: Evaluative tools like the Rorschach Inkolot test.
Controlled Experiments: The preferred scientific method for inferring cause and effect.
Independent Variable ( $IV$ ): The factor manipulated by the researcher.
Dependent Variable ( $DV$ ): The outcome measured by the researcher, which depends on the $IV$ .
Experimental vs. Control Groups: The experimental group receives the treatment, while the control group receives a placebo (e.g., a saline injection) to eliminate the "placebo effect" as a confounding variable.

Data is a plural term (e.g., "the data are").
Correlation: Indicates a relationship between variables, measured by a Pearson correlation coefficient ranging from $-1.0$ to $+1.0$ .
Correlation does not imply causation. An example is the correlation between IQ and shoe size, which is actually linked by the third factor of age.

Case Studies: Detailed observation of a single individual, such as Phineas Gage, whose frontal lobe injury provided insight into the brain's role in personality.
Longitudinal Studies: Research conducted over long periods (weeks, months, or years).
Cross-cultural Studies: Research comparing different cultures to ensure findings are not limited to specific populations like college students.
Biological Perspective: Focuses on physiological hardware (e.g., Hubel, Wiesel, and Roger Sperry).
Psychodynamic Perspective: Originating with Sigmund Freud, focusing on underlying psychic drives and conflicts. Karen Horney offered a critique of the sexist elements in Freud's work.
Cognitive Perspective: Focuses on mental processes like thinking. Includes Edward Tolman's "cognitive maps" and Jean Piaget's stages of development.
Humanistic Perspective: A positive view of human nature led by Carl Rogers and Abraham Maslow (Hierarchy of Needs), emphasizing that humans are fundamentally good.
Eclectic Approach: Combining various perspectives to capitalize on their collective strengths.

The "George" Scenario: A demonstration of framing bias where students were asked to recommend a jail sentence for a fictional character. Outcomes changed significantly based on the range of sentencing options provided (lighter frames led to lighter recommendations).
The Doonesbury Comic: A professorial character makes increasingly absurd statements like "Jefferson was the antichrist" and "Democracy is fascism" to highlight the danger of passive learning and the necessity of student engagement.