Introduction to Psychology and Senses

• Psychology’s focus is on understanding behavior through observation and sensory input.
  • Key takeaway: Knowledge is derived from our senses.

Goals of Psychology

• Three main goals in behavioral science:
  • Observe: Collect data through observation.
  • Describe: Summarize observations of behavior (same as observe).
  • Explain: Provide an understanding of the behavior based on observations.
  • Predict: Use observations to foresee future behaviors.

Pseudoscience in Psychology

• Definition: Pseudoscience denotes false or misleading scientific claims.
  • Example: Astrology is frequently cited as a pseudoscientific belief.

Psychological Perspectives

• Different perspectives of psychology focus on various aspects of behavior:
  • Biological Perspective: Focuses on the brain and nervous system to understand behavior.
  • Cognitive Perspective: Relates to thoughts, beliefs, and decision making processes.
  • Learning / Behavioral Perspective: Emphasizes behavior influenced by the environment, not necessarily involving people.
  • Sociocultural Perspective: Focuses on how social interactions and cultural contexts influence behavior. Includes norms, expectations, stereotyping, and prejudice.

Research Design

• Components of experimental research design:

  • Independent Variable: The variable manipulated by the researcher (e.g., type of drink - Gatorade vs. water).
  • Dependent Variable: The outcome measured (e.g., running performance).

• Operational Definitions: Define intangible concepts by observable measures.

  • Example for fear: Includes behaviors like screaming, quivering, running, sweating, etc.
  • Verbal Indicators: "I am scared" can also count as operationally defining fear since observable.

Types of Research Designs

• Mentioned research designs include:

  • Correlational: Examines relationships but does not imply causation.
  • Descriptive: Provides details without manipulation.
  • Experimental: Only design that allows causal conclusions.
  • Requires random assignment to ensure groups are equivalent.
  • Quasi-Experimental: Lacks true independent variable manipulation, often based on existing groups (e.g., parental divorce).

• Longitudinal vs. Cross Sectional:

  • Longitudinal studies occur over time; Cross-sectional studies look at one point in time.

Correlation Understanding

• Types of correlation:
  • Positive Correlation: Variables increase or decrease together (e.g., temperature and class attendance).
  • Negative Correlation: One variable increases as the other decreases.

Reliability and Validity in Psychology

• Reliability: Consistency over time in measurements.
• Validity: Accuracy in measuring what is intended to measure (e.g., exams measuring intellect should not involve unrelated skills like deadlifting).

Experiment Structure

• Importance of random assignment to eliminate confounding variables in experiments.
• Critical understanding of brain structures limited for exams, focusing on broader ideas.

Brain Anatomy and Functions

• Key components of a neuron:

  • Dendrites: Receive signals.
  • Axon: Transmits impulses.
  • Terminal Buttons: Release neurotransmitters.
  • Synapse: The gap between neurons where neurotransmission occurs.

• Action Potential: Describes the electrochemical process in neuron firing.

  • Neurotransmitter release is triggered by an electrochemical signal.

Memory Concepts

• Types of memory:
  • Sensory Memory: Very brief retention of sensory stimuli.
  • Examples: Iconic Memory (visual, <0.5 seconds) and Echoic Memory (auditory, 1-2 seconds).
  • Short-Term Memory: Retains information for about 30 seconds; capacity is typically 7±2 items (George A. Miller's theory).
  • Long-Term Memory: Potentially limitless duration & capacity (declarative vs. nondeclarative).

Types of Long-Term Memory

• Declarative Memory: Explicit memories, such as facts (semantic) and personal experiences (episodic).
• Nondeclarative Memory: Implicit memories like skills and conditioned responses.

Cognitive Learning Theories

• Classical Conditioning: Associations learned through reflexive responses (Pavlov's dogs, neutral stimuli becoming conditioned stimuli).
• Operant Conditioning: Voluntary behavior shaped by reinforcement or punishment.
  • Positive reinforcement: Adding stimuli to increase behavior.
  • Negative reinforcement: Removing stimuli to increase behavior.
  • Positive punishment: Adding negative stimuli to decrease behavior.
  • Negative punishment: Removing positive stimuli to decrease behavior.

Cognitive Constructs

• Concepts like chunking improve memory retention by organizing information.
• Elaboration: Creating multiple associations to enhance memory recall.

Psychological Theories and Perspectives

• Psychodynamic Perspective: Explores unconscious influences on behavior (Freud's theories).
• Humanistic Psychology: Focuses on personal growth and self-actualization (Maslow's hierarchy of needs).
• Behavioral Theories: Concentrate on observable behaviors and the responses they elicit.

Developmental Psychology

• Stages of Prenatal Development:
  • Germinal, Embryonic, and Fetal.
  • Agents causing birth defects (teratogens) include substances like alcohol & environmental factors.
• Attachment Styles: Secure vs. insecure (attachment theory by Ainsworth).

Personality Psychology

• Trait Theory: Assesses personality through five major dimensions known as the Big Five (OCEAN).
• Reciprocal Determinism: Bandura's concept linking behavior, personal factors, and environmental influences.

Disorders and Therapies

• Classification of disorders like mood disorders, anxiety disorders, etc.
• Treatments in psychology:
  • Cognitive Behavioral Therapy (CBT): Focuses on altering irrational thoughts to modify behavior.
  • Humanistic Therapy and Psychodynamic Therapy.
  • Understanding that some drugs act as either depressants or stimulants.

Conclusion

• Importance of comprehensive sex education over abstinence-only programs in preventing unwanted pregnancies and STDs.
• Distinction between gender identity (individual self-perception) and sexual orientation (attraction to others).