This unit introduces fundamental concepts in psychology, covering its definition, the nature vs. nurture debate, and the seven major psychological perspectives. Students should be prepared to define key terms, differentiate between various approaches, and understand how each perspective explains behavior. Pay close attention to the distinctions between nature and nurture, and the unique focus of each psychological approach.
What is Psychology?
Psychology is defined as the scientific study of the mind and behavior.
Concept
Psychology
The scientific study of the mind and behavior.
Nature vs. Nurture
This topic defines nature as genetics and heredity, and nurture as environmental influences.
| Nature | Nurture | |
|---|---|---|
| Definition | Genetics and Heredity; the passing on of physical and mental traits. | Environment; influences like family life, social groups, education, societal factors. |
| Mechanism | Traits passed from one generation to another. | External factors shaping an individual's development. |
Beyond 'Vs.'
The debate is a 'trick question'; modern understanding emphasizes nature AND nurture working together, not as opposing forces.
Approaches / Perspectives
This section introduces the seven psychological perspectives that form the Biopsychosocial model.
The Seven Psychological Perspectives are different ways of viewing and explaining behavior and mental processes. These perspectives collectively form the basis of the Biopsychosocial model (see Biopsychosocial).
Seven Psychological Perspectives
Different lenses for understanding mind and behavior.
Biological
Focuses on brain, neurotransmitters, hormones, and genetics (see Biological).
Evolutionary
Explains behavior through natural selection and genetic inheritance (see Evolutionary Approach).
Cognitive
Examines how individuals interpret, process, and remember information (see Cognitive).
Humanistic
Emphasizes freewill, self-actualization, and human potential (see Humanistic).
Psychodynamic
Focuses on unconscious mind and early childhood experiences (see Psychodynamic Perspective).
Behavioral
Studies observable behaviors and environmental influences (see Behavioral).
Sociocultural
Examines how culture and social groups shape behavior (see Sociocultural).
NATURE vs. NURTURE Spectrum
These approaches fall along a spectrum from emphasizing NATURE (e.g., Biological, Evolutionary) to NURTURE (e.g., Sociocultural, Behavioral), with others in between (e.g., Cognitive, Psychodynamic, Humanistic).
Evolutionary Approach
The Evolutionary Approach explains behavior through natural selection and genetic inheritance.
This approach, influenced by Charles Darwin, posits that Evolution happens by natural selection.
Concept
Natural Selection
Individual traits that are beneficial to the survival of the species are more likely to persist, while undesirable traits would 'die off'.
Concept
Eugenics
The belief in improving the genetic quality of the human population by selectively breeding for desirable traits and discouraging reproduction among those with traits considered undesirable.
Eugenics: A Dangerous Misapplication
Eugenics is a discredited and unethical concept, notably used by the Natzis to justify horrific acts. It is crucial to distinguish it from the scientific principles of natural selection.
Epigenetics
Epigenetics explores how environment and behavior affect gene expression without changing DNA.
Concept
Epigenetics
How the environment and a person's behavior affect a person's genes and how they work, specifically by turning certain genes on or off.
This process is based on sustained environment pressures that influence how an individual's body reads a DNA sequence.
Key Distinction: DNA Change
In epigenetics, the DNA itself is NOT changing; rather, the expression of genes (whether they are 'on' or 'off') is altered.
Our understanding of epigenetics comes from studies such as Identical Twin studies, family studies, and adoption studies.
Identical Twin Studies
Identical twin studies investigate how identical DNA can lead to different physical and mental characteristics.
Concept
Identical Twin Studies
Research that examines why identical twins (who share identical DNA) often develop vastly different physical and mental characteristics.
The Minnesota Twin Study is a prominent example, investigating identical twins like Cole and Christopher who were separated at birth and raised in different environments. These studies explore traits such as Intelligence (including attention) and Temperament.
Other related research includes Family and Adoption Studies (often Longitudinal Studies), such as the Colorado Adoption study, which also contribute to understanding nature vs. nurture influences.
Plasticity (Biological Perspective)
Plasticity refers to the brain's ability to change and adapt through strengthening or weakening neural connections.
Concept
Plasticity
The brain's ability to change and adapt as a result of experiences, specifically through the strengthening or weakening of neural connections.
This concept is central to the Biological Perspective (see Biological) as it explains how the brain can reorganize itself throughout life.
Distinguishing Biological Adaptations
It's important to differentiate Plasticity (individual brain changes from experience) from Natural Selection (species-level genetic changes over generations) and Epigenetics (gene expression changes due to environment without altering DNA sequence).
Psychodynamic Perspective (Psychoanalytic)
The Psychodynamic Perspective, founded by Sigmund Freud, focuses on the unconscious mind and early childhood experiences.
Concept
Psychodynamic Perspective
Also known as Psychoanalytic, this perspective was founded by Sigmund Freud and focuses on the influence of the unconscious mind and early childhood experiences on behavior and personality.
Behavioral
Views psychology as an objective science studying observable behaviors, emphasizing environmental roles.
Concept
Behavioral Perspective
States that Psychology should be an objective science that focuses on studying observable behaviors without referencing the mental processes.
Key figures include Pavlov, B.F. Skinner, and John B. Watson. This perspective emphasizes the role of the environment in shaping behaviors through Association or Reinforcement/Punishment.
| Classical Conditioning | Operant Conditioning | |
|---|---|---|
| Type of Learning | Associative Learning (learning to associate two stimuli) | Reinforcement and Punishment Learning (learning to associate a behavior and its consequence) |
Sociocultural
Examines how culture, norms, and social influences shape an individual's experiences and behavior.
Concept
Sociocultural Perspective
Focuses on a person's experiences and influences in their life to better understand how culture shapes an individual.
Concept
Cultural norms
Behaviors and beliefs shaped by expectations and rules within a society, leading to Cultural expectations.
This perspective often highlights distinctions, such as observed differences between East Asians and Americans in certain psychological phenomena due to cultural influences.
Concept
Vygotsky's Zone of Proximal Development
A concept emphasizing that learning occurs most effectively when individuals receive adult guidance or support from more capable peers.
Humanistic
Emphasizes freewill and self-actualization, championed by Carl Rogers and Abraham Maslow.
Concept
Humanistic Perspective
Championed by Carl Rogers and Abraham Maslow, this perspective emphasizes freewill and a person's desire to move toward Self-Actualization, highlighting our potential as humans to grow as individuals.
Concept
Freewill
The capacity of individuals to make choices and control their own lives.
Concept
Self-Actualization
The process of fulfilling one's full potential and achieving personal growth.
MASLOW'S HIERARCHY OF NEEDS
A motivational theory in psychology comprising a five-tier model of human needs, often depicted as hierarchical levels within a pyramid.
SELF-ACTUALIZATION
Achieving one's full potential, including creative activities.
ESTEEM
Prestige and feeling of accomplishment.
LOVE/BELONGING
Intimate relationships, friends.
SAFETY
Security, safety.
PHYSIOLOGICAL
Food, water, warmth, rest.
Cognitive
Focuses on how individuals interpret, process, and remember information, influencing behavior.
Concept
Cognitive Perspective
Focuses on how individuals interpret, process, and remember information.
This perspective examines how people store information and how this influences their behavior.
Biological
Explores links between biological and psychological processes, including the brain and neurotransmitters.
Concept
Biological Perspective
Explores the links between our biological processes and psychological processes.
It focuses on the brain, neurotransmitters, hormones, and the nervous system's role in influencing thoughts and behaviors. This perspective also examines Neurological conditions, mental disorders, and the effects of medication.
Biopsychosocial
Emphasizes the interconnectedness of biological, psychological, and social factors in understanding health and behavior.
Concept
Biopsychosocial Model
Focuses on the interconnectedness of biological factors, psychological factors, and social factors in understanding behavior and mental processes.
Cause
Biological factors (e.g., genetics, brain chemistry)
Effect
Influence on HEALTH
Cause
Psychological factors (e.g., thoughts, emotions, stress)
Effect
Influence on HEALTH
Cause
Social factors (e.g., culture, relationships, environment)
Effect
Influence on HEALTH
Concept
Circumstances
The situations in which individuals find themselves, often including socio-economic factors, historical events, and the person's geographical location, all contributing to their overall health and behavior.