WKU Summer 20261 Psychology Lecture Notes

The Philosophical and Biological Origins of Psychology

Modern psychology emerged in the 1800's, primarily rooting itself in the disciplines of philosophy and biology as they relate to behavior. Historically, the field was characterized as the study of the mind, the body, and the soul. This era marked a significant transition as the subject moved away from its roots in theology and transformed into a rigorous science.

Structuralism and the First Experimental Laboratory

Wilhelm Wundt is credited with establishing the first experimental laboratory for psychology. Wundt's primary ambition was to create what he described as a "periodic table of our mind." This objective fell under the school of thought known as structuralism. Structuralism focuses on identifying the most basic elements of the mind and analyzing the complicated structures that explain why and how these mental elements grow.

Functionalism and the American Perspective

William James was the first American psychologist to gain prominence. He was the founder of functionalism, a perspective that shifted focus from the structure of the mind to the purpose behind mental activities, states, and processes. James was deeply interested in the evolutionary aspect of psychology, specifically asking why certain mental functions evolved and what purpose they served for human survival and adaptation.

Psychoanalytic Theory and Behaviorism

Sigmund Freud founded psychoanalytic theory, which emphasizes the critical role of the unconscious mind in governing behavior. Freud explored how childhood experiences and past traumas are linked to current relationship issues.

By contrast, behaviorism rose to prominence in the early 1900's. This movement argued for the study of behavior and how organisms interact with their environment, strictly through what could be directly observed. Behaviorists explicitly rejected the study of the "mental realm," choosing instead to focus solely on external, visible actions.

The Cognitive Revolution and Humanism

The Cognitive Revolution, which occurred after World War II, marked a definitive return to the study of the mind. This movement largely canceled out the strict tenets of behaviorism, as researchers realized that understanding complex functions like memory required the consideration of mental representation.

Concurrently, humanism emerged as a perspective emphasizing human potential. Led by figures such as Abraham Maslow, humanism focuses on what humans are capable of and looks at the best we can possibly be. A central component of this field is Maslow's Hierarchy of Needs.

The Scientific Method in Psychology

The scientific method serves as the foundation for all psychological research. It follows a systematic six-step process:

1. Research a topic and identify a specific question.
2. Formulate a hypothesis, defined as an educated guess.
3. Design the study or experiment.
4. Collect data and conclude the initial research phase.
5. Analyze the data.
6. Determine if the hypothesis is supported by the data or not.

Research Methodologies and Systematic Observation

Collecting data in psychology takes many forms, often beginning with systematic observation. This involves gathering data while watching subjects in a specific setting to record their behaviors. These observations are categorized into two types:

Naturalistic observations occur in real-life settings, such as a classroom, a playground, or an organization. Structured observations take place in a fake setting created by researchers to facilitate specific tasks, such as a sleep study.

Other methods include "Tasks and Tests," where subjects perform activities (such as those measuring processing speed) that are scored and compared. "Self-reports" involve individuals providing information about themselves through personality tests, questionnaires, or interviews. Additionally, researchers may measure brain and body activity using physiological tools, such as an EEG scan to monitor a person's brain activity while they look at a scary picture.

Correlation and Causation

Researchers use correlations to identify relationships between variables. A positive correlation occurs when variables move in the same direction. For example, as the number of hours a student studies increases, their test scores also tend to increase.

A negative correlation occurs when variables move in opposite directions. For example, as the number of absences from class increases, a student's grade tends to decrease. If there is no relationship between variables, such as a person's favorite pizza topping and their math grade, it is classified as no correlation. It is a fundamental rule in psychology that correlation is not cause; just because two variables are related does not mean one causes the other.

Experimental Variables and Clinical Studies

In experimental research, the Independent Variable (IV) is the factor that the experimenter manipulates, representing the "cause." The Dependent Variable (DV) is what is measured to determine if the manipulation has produced an "effect."

Participants are generally divided into groups. The experimental group receives the experimental manipulation, while the control group does not. Additionally, researchers may utilize clinical case studies, which involve observational research performed on a single individual.

Replication and Reproduction

Replication is a vital part of the scientific process, involving the repetition of a study to see if the same outcome can be achieved. If a study fails to reproduce its results, researchers may try doing something different to help find the exact way to achieve the desired outcome or to understand why the results changed.