General Psychology 1 & 2
What is Psychology
- Psychology is the scientific study of behavior and mental processes. It explores how people think, feel, and act both individually and in groups.
- Topics include perception, cognition, emotion, development, personality, and social interactions.
Goals of Psychology:
Describe Behavior:
-Identify and detail observed behaviors and mental processes.
Example: Observing and noting how children interact in social settings.
Explain Behavior:
-Understand and clarify why behaviors and mental processes occur.
Example: Investigating why certain teaching methods improve learning outcomes.
Predict Behavior:
-Anticipate how individuals or groups will behave in different situations.
Example: Predicting how stress might affect job performance.
Control or Influence Behavior:
-Apply knowledge to modify or manage behaviors and mental processes for positive outcomes.
Example: Developing therapies to help people manage anxiety or depression.
Socrates, Plato, Aristotle: Early philosophical explorations of the mind and behavior.
Wilhelm Wundt: Establishes the first psychology laboratory at the University of Leipzig, Germany marking the formal beginning of psychology as a scientific discipline.
Edward Titchener: Develops Structuralism, focusing on breaking down mental processes into basic elements.
William James: Advances Functionalism, emphasizing the purpose of mental processes in adapting to the environment.
Sigmund Freud: Develops Psychoanalysis, exploring unconscious processes and childhood experiences.
John B. Watson: Founding figure of Behaviorism, focusing on observable behaviors and environmental influences.
B.F. Skinner: Further develops Behaviorism with his work on operant conditioning.
Carl Rogers: Establishes Humanistic Psychology, emphasizing personal growth and self-actualization.
Abraham Maslow: Develops the hierarchy of needs, a key concept in Humanistic Psychology.
Jean Piaget: Advances the study of cognitive development in children.
Contemporary Trends: Integration of various approaches (biological, cognitive, sociocultural) and the use of advanced research methods and technology continue to shape modern psychology.
Main Approaches in Psychology
- Behavioral Approach- Observable behaviors and their learning or conditioning through environmental interactions.
- Psychodynamic Approach: Unconscious processes, early childhood experiences, and internal conflicts.
- Humanistic Approach: Personal growth, self-actualization, and the positive aspects of human nature.
- Cognitive Approach: Mental processes like thinking, memory, problem-solving, and perception.
- Biological Approach: The influence of brain structure, neurotransmitters, genetics, and the nervous system on behavior and mental processes.
The Beginnings of Life
1.Conception
- Oogenesis and Spermatogenesis: Oogenesis refers to the formation of eggs in the ovaries, while spermatogenesis refers to the formation of sperm in the testes.
- Ovulation: The release of an egg from the ovary into the fallopian tube.
- Fertilization: Occurs when a sperm cell penetrates the egg, leading to the formation of a zygote, typically in the fallopian tube.
- Zygote Formation: The fertilized egg (zygote) contains 23 pairs of chromosomes, half from the mother and half from the father. The zygote will start dividing and developing.
2. Prenatal Development
- Germinal Stage (0-2 weeks):
- Fertilization to Implantation: The zygote undergoes rapid cell division, forming a blastocyst that implants in the uterine wall.
- Formation of the Placenta: The placenta begins forming, providing nutrients and oxygen to the embryo and removing waste products.
- Embryonic Stage (2-8 weeks):
- Organogenesis: Major organs and structures, such as the heart, brain, spinal cord, and limbs, begin to develop.
- Note: This stage is crucial for organ development, and exposure to harmful substances can cause significant birth defects.
- Fetal Stage (9 weeks to birth):
- Growth and Maturation: The fetus undergoes rapid growth, organs continue to mature, and by the end of this stage, the fetus can respond to stimuli and has developed most structures needed for survival outside the womb.
- The fetus gains weight, and organs like the lungs and brain reach full functionality.
3. Factors Influencing Prenatal Development
- Genetics:
- Chromosomal Abnormalities: e.g., Down Syndrome
- Genetic Disorders: e.g., Heart Disease and Cancers
- Environment:
- Teratogens: Harmful substances such as drugs, alcohol, or certain infections.
- Nutrition: Nutritional deficiencies can impact development.
Heredity, Growth, Development, and Maturation
1. Heredity: The passing on of physical or mental characteristics genetically from one generation to another.
2. Growth vs. Development:
- Growth: Quantitative increase in size or mass, such as an increase in height, weight, or body organs. Examples include growth spurts during adolescence, weight gain in infancy, and muscle development in early childhood.
- Development: Qualitative changes and the acquisition of skills, abilities, and cognitive functions. Development includes physical, cognitive, emotional, and social aspects. Examples include cognitive development milestones like learning to walk, language acquisition, problem-solving skills, and social skills development.
3. Maturation: The process of reaching full functional capability as a result of the gradual unfolding of genetic potentials. Maturation is largely influenced by genetics but can be affected by environmental factors.
Stages of Human Development
1. Infancy: Physical, cognitive, and social development milestones.
2. Early Childhood: Key developments in motor skills, language, and socialization.
3. Middle Childhood: Cognitive abilities, social interactions, and self-concept.
4. Adolescence: Puberty, identity formation, and emotional changes.
5. Adulthood: Physical changes, career development, and relationships.
6. Late Adulthood: Aging process, cognitive decline, and life review.
Erik Erikson Psychosocial Development
1. Trust vs. Mistrust (Infancy, 0-1 year): Developing trust when caregivers provide reliability, care, and affection. A lack of this leads to mistrust.
2. Autonomy vs. Shame and Doubt (Early Childhood, 1-3 years): Developing a sense of personal control over physical skills and a sense of independence. Failure results in feelings of shame and doubt.
3. Initiative vs. Guilt (Preschool, 3-6 years): Asserting power and control over the environment through directing play and other social interactions. Success leads to a sense of initiative, while failure results in guilt.
4. Industry vs. Inferiority (School Age, 6-12 years): Coping with new social and academic demands. Success leads to a sense of competence, while failure results in feelings of inferiority.
5. Identity vs. Role Confusion (Adolescence, 12-18 years): Developing a personal identity and sense of self. Success leads to an ability to stay true to oneself, while failure leads to role confusion and a weak sense of self.
6. Intimacy vs. Isolation (Young Adulthood, 18-40 years): Forming intimate, loving relationships with others. Success leads to strong relationships, while failure results in loneliness and isolation.
7. Generativity vs. Stagnation (Middle Adulthood, 40-65 years): Creating or nurturing things that will outlast oneself, such as raising children or contributing to positive changes. Success leads to feelings of usefulness and accomplishment, while failure results in shallow involvement in the world.
8. Integrity vs. Despair (Maturity, 65-death): Reflecting on life and feeling a sense of fulfillment or despair. Success at this stage leads to feelings of wisdom, while failure results in regret, bitterness, and despair.
Biopsychology- a branch of psychology that studies how biological processes influence behavior.
Behavior- shaped by the brain, nervous system, and environment.
Cerebrum- The largest part of the brain, responsible for higher brain functions like thought, reasoning, memory, voluntary movement, thinking, memory, and sensory processing.
Frontal lobe- Involved in decision-making, problem-solving, and controlling voluntary movements.
Parietal lobe- Processes sensory information like touch, temperature, and pain.
Temporal lobe- Handles auditory information and is important for memory and speech
Occipital lobe- Responsible for visual processing.
Cerebellum- Located under the cerebrum, it coordinates muscle movements, posture, and balance. Controls balance and coordination.
Brainstem- Connects the brain to the spinal cord and controls basic life functions such as breathing, heart rate, and blood pressure. Regulates basic life functions (breathing, heart rate).
Amygdala- Involved in emotional processing, especially fear and pleasure.
Hippocampus- Crucial for memory formation.
Hypothalamus- Regulates bodily functions like temperature, hunger, and the release of hormones.
Central Nervous System (CNS)- Brain and spinal cord. It processes information and is responsible for decision-making, emotions, memory, and reflexes.
Brain- Processes information and controls thoughts, emotions, and behaviors. Processes sensory input and sends out motor responses
Spinal Cord- Relays signals between the brain and the body. Acts as a highway for messages between the brain and the rest of the body. Controls reflex actions without involving the brain directly.
Peripheral Nervous System (PNS)- Nerves outside the brain and spinal cord. It manages both voluntary and involuntary actions.
Somatic System- Controls voluntary movements (e.g., muscle movements).
Autonomic System- Controls involuntary functions (e.g., heart rate, digestion)
Sympathetic (Fight or Flight)- Prepares the body for stress or danger. It prepares you to either fight the danger or flee from it
Parasympathetic (Rest and Digest)- Calms the body after stress
Reflexes- an automatic and quick reaction your body has to something without you having to think about it.
Dendrites- Receive signals from other neurons.
Axon- Carries electrical signals (action potential).
Synapse- Gap where neurons communicate with each other.
Resting Potential- Neuron is inactive.
Depolarization- Neuron is activated, and the electrical charge changes.
Repolarization- Neuron returns to its resting state.
Refractory Period- Neuron cannot be activated again right away
Endocrine system- consists of glands that secrete hormones, regulating various bodily functions like metabolism, growth, and mood.
Pituitary Gland- The "master gland" that controls other glands and regulates growth, reproduction, and metabolism.
Thyroid Gland- Controls metabolism and energy usage.
Adrenal Glands- Produces adrenaline and cortisol, important in stress responses.
Pancreas- Regulates blood sugar through insulin production.
Gonads- Testes and ovaries, responsible for sexual development and reproduction.
Adrenaline- Prepares the body for "fight or flight" in stressful situations.
Cortisol- Regulates stress and helps control blood sugar.
Insulin- Lowers blood sugar levels by facilitating glucose uptake.
Exocrine glands- Release substances through ducts to specific locations either outside the body or onto internal surfaces. These secretions usually have local effects and include enzymes, sweat, and saliva.
Sweat Glands- Release sweat to help cool the body and excrete waste products.
Salivary Glands- Secrete saliva, which aids in digestion and keeps the mouth moist.
Lacrimal Glands- Produce tears to lubricate and protect the eyes.
Mammary Glands- Produce milk to nourish infants.
Pancreas (Exocrine Function)- Produces digestive enzymes that are released into the small intestine to aid in digestion.
Sebaceous Glands- Secrete oil (sebum) to lubricate the skin and hair.
Sensation- detecting stimuli (like colors or sounds)
Perception- organizes and interprets these sensations into meaningful experiences.
Sensory Threshold- Refers to the minimum level of stimulus intensity needed for detection.
Absolute Threshold- The lowest level of a stimulus (e.g., sound, light) that can be detected 50% of the time. Detection can vary based on factors like intensity and the individual's psychological state.
Difference Threshold- The minimum change in a stimulus that can be detected(e.g., noticing a slight increase in sugar or volume). This change, known as the "just noticeable difference"
Sensory Adaptation- The process where sensitivity to a constant stimulus decreases over time. For example, we stop noticing the feel of clothes on our skin after a while.
Selective perception- The process by which we focus on certain stimuli while ignoring others.
Focus- Includes what we clearly perceive.
Margin- consists of stimuli we notice only vaguely.
Form perception- organizing raw visual sensations into meaningful shapes, patterns, or ideas. A key aspect is distinguishing a figure (object) from its ground (background). The whole is more than the sum of its parts.
Proximity- Items close together in space or time are perceived as belonging to a group.
Similarity- Similar objects, like dots or rings, are grouped together, forming recognizable patterns, such as triangles or stars.
Good Figure (Symmetry)- We tend to organize objects into balanced or symmetrical shapes, even when they are made up of different elements.
Continuation- We perceive lines or shapes as continuing in the same direction, whether straight or curved.
Closure- Our mind fills in gaps in sensory information to create a complete image or form.