Evolutionary Psychology: Foundations and Key Concepts

Evolutionary Psychology

Introduction to Evolutionary Psychology (1980's)

Evolutionary psychology is a theoretical approach that examines how human behavior and mental processes have been shaped by natural selection. It seeks to understand the adaptive functions of psychological traits and behaviors in the context of evolution.

• Focus: How evolutionary processes influence cognition, emotion, and behavior.

• Key Principle: Many psychological mechanisms are believed to have evolved to solve recurrent problems faced by our ancestors.

Historical Context

Early psychological theories did not fully account for evolutionary influences. The rise of evolutionary psychology was partly due to collaboration with other fields such as anthropology, sociology, and biology.

• Functionalism: Considered the purpose of mental processes but did not integrate evolutionary theory.

• Modern Perspective: Evolutionary psychology reintroduced evolutionary thinking to explain complex human behaviors.

Main Research Question

Central to evolutionary psychology is the question: How and why did complex psychological traits and behaviors evolve through natural selection?

• Investigates the adaptive value of behaviors such as cooperation, aggression, mating, and parenting.

Important Founders

John Garcia (1917–2012)	Leda Cosmides and John Tooby
Did research in the 1960's on how animals respond to stimuli, especially in learning and conditioning. Found that learning is influenced by biological preparedness—animals are more likely to associate certain stimuli with specific outcomes (e.g., taste with nausea). His findings supported the idea that psychological processes are linked to biological and evolutionary factors.	Did systematic research throughout the 1980's and 90's to establish evolutionary theory in psychology. Researched topics such as mate selection, altruism, and memory. Credited with making evolutionary psychology a formal field.

Example Application

Evolutionary psychologists study how emotions like guilt and shame can motivate prosocial behaviors. For instance, research may show that "prosocial behaviors increase communal cooperation and rank within the social hierarchy, both of which contribute to mate selection and reproductive capacity." This demonstrates how evolutionary psychology links emotional processes to adaptive outcomes.

• Example Question: A psychologist who studies how emotions motivate behavior in the context of mate selection and reproductive success is most likely an evolutionary psychologist.

Key Terms and Definitions

• Natural Selection: The process by which traits that enhance survival and reproduction become more common in successive generations.

• Biological Preparedness: The idea that organisms are innately predisposed to form associations between certain stimuli and responses.

• Adaptive Function: The role a psychological trait or behavior plays in increasing an organism's fitness (survival and reproduction).

Summary Table: Evolutionary Psychology vs. Other Approaches

Approach	Main Focus	Key Example
Evolutionary Psychology	Adaptive value of behavior and mental processes	Mate selection, altruism, emotional responses
Cognitive Psychology	Information processing, memory, perception	Problem-solving, decision-making
Behaviorism	Observable behavior, learning through conditioning	Classical and operant conditioning

Additional info:

• Evolutionary psychology is relevant to the Biological Perspective (Ch. 2) and Cognition (Ch. 7) in psychology curricula.