biological theories

Personality Theory

Evolution of Human Behavior

  • Loss of instinctive behavior in favor of learning and adaptation as humans evolved.

  • Ability to pass on learning is foundational for culture.

  • Success of the human species demonstrates advantages of learning and culture.

  • Despite cultural evolution, biological influences on behavior persist.

    • Certain groups may have biological predispositions for specific behaviors.

    • All humans exhibit some degree of biological predispositions.

Chapter Overview

  • First Half: Examination of biological predispositions in personality.

  • Second Half: Connection between mind and body, techniques to enhance balance and health.

Mindfulness and Meditation

  • Gotama Buddha's Understanding: Introduced mindfulness exercises to train the mind.

    • Basis for many meditation styles.

  • Current Research: Neurobiologists employ functional magnetic resonance imaging (fMRI) to study brain activity during meditation.

    • Investigating if meditation can truly alter mental states.

  • Physical Concerns: Excessive meditation can weaken the body.

    • Bodhidharma, founder of Zen Buddhism, developed physical training techniques for monks, leading to martial arts.

    • Martial arts linked to character development; promotes calmness, humility, and confidence.

Historical Context of Personality Theories

  • The chapter places personality theories in a broad historical context.

  • Buddha's mindfulness teachings as the first psychological theory regarding mind control.

  • Modern neurobiologists aim to uncover the mechanisms of meditation and its mental health benefits.

Key Theorists

Wilhelm Reich
  • Influenced by Sigmund Freud, emphasized mind-body connection.

    • Asserted psychological health comes from satisfying biological needs, especially sexual.

    • Pioneering early concepts related to sociobiology, relating behaviors to evolutionary advantages.

Sociobiology Concept
  • Behaviors that promote genetic reproduction are naturally selected.

  • Explores how Eastern philosophies (mind control) contrast with Western (expression of biological desires).

    • Buddha's teachings promote awareness and control over desires.

    • Martial arts developed to maintain health for meditation practices.

Biology and Personality

Genetic Makeup
  • Genetics provide a unique blueprint for individuals but do not determine personality entirely.

  • Genetic traits create boundaries within which personality develops, influenced primarily by environmental factors.

  • Focus on behaviors most affected by genetics rather than those determined by environment.

Determining Genetic vs. Environmental Influence
Twin Studies
  • Sir Francis Galton pioneered twin studies, studying mental abilities.

  • Identical twins share 100% of genetic material; fraternal twins share around 50%.

  • Twin studies contribute to understanding genetic influence through heritability, measured in populations.

    • Heritability: Variance in behavioral traits attributable to genetics; not applicable to individual assessments.

Adoption Studies
  • Adopted children isolate genetic influences as they are raised in different environments.

  • Intelligence research controversial; estimates of heritability range from 65-85% but change with age.

Family Studies
  • Family environments provide genetic similarities but can also differ significantly in treatment, affecting development.

    • Examples of differing parental treatments impacting psychological outcomes noted in literature.

Behavior Genetics
  • Studies on genetics and behavior typically compare twins, siblings, and unrelated individuals.

  • Notable studies include the Minnesota Twin Family Study.

Temperament and Personality

Jerome Kagan's Work
  • Temperament: Emotional component of personality that manifests early and has some genetic influences.

    • Temperamental qualities include activity, irritability, and fearfulness.

    • Kagan observed inhibition vs. fearless exploration in children; genetics influences long-term outcomes.

Research on Big Five Personality Traits
  • Heritability of the Big Five traits: 42-57%

  • Environmental factors contribute significantly, shaping personality complexities.

Sociobiology and Evolutionary Psychology

Foundations of Sociobiology
  • Applies evolutionary biology principles to social behavior.

  • Conducted primarily with non-human animals to understand personality traits.

Inclusive Fitness Concept
  • Examines behaviors that support genetic survival, including parenting and mate selection.

    • Men and women have different evolutionarily adapted behaviors regarding reproductive strategies.

    • Metabolic advantages observed in male reproductive strategies.

Religion's Role
  • Explores the evolutionary basis of religion and its social implications regarding conformity and group survival.

Martial Arts and Mind/Body Connection

History and Philosophy
  • Martial arts developed in East Asia, emphasizing discipline, control, and spirit, often linked to meditation practices.

  • Bodhidharma formalized Kung Fu at Shao-Lin temple integrating physical fitness for meditation.

Techniques of Mindfulness in Current Research

  • Mindfulness techniques inform modern psychotherapy, including stress reduction protocols and applications in managing psychological issues like anxiety and depression.

  • Research indicates benefits of meditation include changes in brain structure associated with attention and emotional regulation.

Integrative Theories

  • Connection between ancient philosophies, modern psychological approaches, and technologies reflects an overarching theme in psychology focusing on body awareness and mental states.

  • Exploration of how various traditions all intersect on understanding human existence.

  • Continual integration of findings can provide holistic insights into personality and behavior.