Notes: Perspectives, Biopsychosocial Model, and Scientific Method

Perspectives in Psychology (Key Insights)

  • Psychodynamic perspective
    • Associated with Sigmund Freud; unconscious conflicts (usually sexual or aggressive) shape personality.
    • Focus on unconscious thoughts, childhood experiences, and backward-looking exploration.
  • Behavioral perspective
    • Focus on observable behavior and how it’s shaped by reinforcement and punishment.
    • Goals: modify behavior via action steps; origin of behavior not essential for change.
    • BF Skinner emphasis: treatment and behavior change, not the why.
  • Cognitive perspective
    • Emphasizes mental processes: perception, thinking, memory, problem-solving.
    • How information is processed can influence behavior.
  • Humanistic perspective
    • Focus on self-actualization and realizing one’s full potential.
    • Emphasis on personal growth and meaning.
  • Evolutionary/Biological perspective
    • Natural selection and genetic factors shape behavior.
    • Behavioral genetics and DNA as a basis for behavior; interaction with environment.
  • Sociocultural perspective
    • Role of social and cultural factors on behavior and mental processes.
    • Culture can influence expression of disorders, norms, and behaviors; example: individualistic vs collectivistic cultures.
  • Positive psychology (PERMA-focused)
    • Studies flourishing, not just illness relief.
    • PERMA: Positive emotion, Engagement, Relationships, Meaning, Accomplishment.
    • Martin Seligman’s work: optimists live longer; money-happiness link is curvilinear; relationships/time often matter more than money.
    • Evidence-based practices: 10–20 activities reliably increase happiness beyond placebo.

Biopsychosocial approach

  • Integrates biology, psychology, and sociocultural context
  • Provides a fuller understanding of behavior by considering all three levels simultaneously

Nature vs. Nurture and gene–environment interaction

  • Biology and environment are intertwined; genes set predispositions that are expressed through environmental experiences
  • Example: tall parents vs. height outcome; nutrition/health access can influence genetic height potential
  • Conclusion: development, personality, and behavior emerge from the interaction of genetics and environment

Contemporary context and sociocultural factors

  • Culture now recognized as central to psychology
  • Sociocultural perspective emphasizes social and cultural influences on behavior and mental processes
  • Culture can affect diagnosis, treatment, and prevalence of disorders across cultures

Happiness and positive psychology findings ( PERMA )

  • Happiness involves more than reducing misery; it includes positive emotion, engagement, relationships, meaning, and accomplishment
  • Core insights from Seligman’s work:
    • Optimism linked to longer life by about 6{-}8\text{ years} when controlling for biology
    • Money has a curvilinear relationship with happiness: gains matter up to a point; beyond roughly 80{,}000\/year, additional income yields diminishing happiness returns
    • Time with loved ones and social connections often yields greater life satisfaction than extra income
  • PERMA: a framework for building well-being and flourishing

The biopsychosocial model in practice

  • We assess biology (genetics, neurobiology), psychology (thoughts, emotions, behaviors), and sociocultural context (relationships, culture, society)
  • Helps explain variability in behavior and mental processes across individuals

The scientific method in psychology (four general steps)

  • Step 1: Develop a research question based on theoretical framework
  • Step 2: Formulate a testable hypothesis with variables
    • Define independent (IV) and dependent variables (DV) as applicable
  • Step 3: Gather evidence (data collection)
  • Step 4: Draw conclusions with attention to generalizability
    • Be cautious about applying findings beyond the studied population

Data collection methods (overview)

  • Case study
    • In-depth study of a small number of cases; rich qualitative data
    • Pros: detailed; Cons: not generalizable, labor-intensive, possible memory bias
  • Naturalistic observation
    • Observe behavior in natural environment without manipulation
    • Pros: high ecological validity; Cons: observer bias, lack of control; mitigated by multiple observers
  • Surveys (questionnaires/structured interviews)
    • Pros: scalable, large samples; Cons: social desirability bias, volunteer bias, memory/recall issues
  • Sampling concepts
    • Population: entire group of interest
    • Sample: subset studied
    • Random sampling: equal chance of selection to improve generalizability

Correlational vs experimental designs

  • Correlational design
    • Examines relationships between variables without manipulation
    • Correlation coefficient: r\in[-1,1]
    • Magnitude (strength) is indicated by the absolute value |r|; sign indicates direction
    • Important: correlation does not imply causation; third-variable effects possible
    • Example: relationship between harsh parenting and child aggression; high r indicates association but not causation
  • Experimental design (preview for next time)
    • Inference of causation through controlled manipulation and random assignment

Quick reference for test preparation

  • Key takeaways
    • There is no single perspective sufficient to explain all behavior
    • The biopsychosocial model integrates multiple levels of analysis
    • Nature and nurture interact to shape development and behavior
    • Positive psychology shifts focus to flourishing, not just illness relief
    • In research, distinguish between correlational findings and causal conclusions
    • Be mindful of biases in data collection and the limits of generalizability

Next steps

  • We will cover experimental design, causation, and control of variables in the next session