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Chapter 4: The Individual in Society Section 1 Personality Development

Chapter 4: The Individual in Society Section 1 Personality Development. Case Study: Identical Strangers.

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Chapter 4: The Individual in Society Section 1 Personality Development

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  1. Chapter 4: The Individual in Society Section 1 Personality Development

  2. Case Study: Identical Strangers To understand the effects of “nature and nurture” on human development, some scholars have studied identical twins separated at birth and adopted by different families. One important study by Peter Neubauer used adopted twins without their knowledge. These studies revealed that even twins separated at birth share some characteristics with their siblings years later. This proves that while some traits are genetically inherited, others are learned from the environment in which a child is raised.

  3. Section 1 at a Glance • Personality Development • People develop their personalities over the course of their lives. • While scientists have debated for years whether nature or nurture plays a bigger role in personality development, most social scientists today believe that environmental factors have the biggest influence. • According to social scientists, the principal factors that influence personality and behavior are heredity, birth order, parental characteristics, and cultural environment. • Studies of isolated children suggest the importance of environment in personality development.

  4. Personality Development • Main Idea • Although the nature versus nurture debate has raged for decades, most social scientists believe a blend of the two influences personality. • Reading Focus • What is the history behind the nature versus nurture debate? • What are the main factors that affect personality development? • How does social environment influence personality?

  5. What makes you the person that you are?

  6. Nature Nurture • Heredity is the transmission of genetic characteristics from parents to children • Instinct is an unchanging biologically inherited behavior • Sociobiology searches for the biological basis of all social behavior • Social environment can imprint characteristics on a child • Pavlov’s experiments showed that behavior could be taught • Most social scientists believe personality arises from a mixture of both nature and nurture Nature Versus Nurture A personality is the sum total of behaviors, attitudes, beliefs, and values that are characteristic of an individual.

  7. Reading Check Summarize What arguments have been made to support each side in the nature versus nurture debate? Answer: Argument supporting nature—scientists claimed that instinctual drives were responsible for everything; argument supporting nurture—Pavlov’s research with the behavior of dogs suggested that humans could be taught supposedly instinctual behavior

  8. Factors in Personality Development • Heredity • Characteristics present at birth include hair type, eye color, and certain aptitudes. • Biological needs include hunger and thirst. • Culture decides how you will use or satisfy hereditary characteristics. • BirthOrder • Personalities are influenced by brothers and sisters. • Early-born siblings have different traits than later-born siblings. • Parental Characteristics • Age, level of education, religious orientation, economic status, cultural heritage, and occupation of parents can shape personalities of children. • The Cultural Environment • Each culture has set “model personalities.” • Individuals experience a culture in different ways.

  9. Reading Check Find the Main Idea How do heredity, birth order, parental characteristics, and cultural environment influence personality? Answer: All four factors intermingle to develop a person’s unique personality; heredity establishes tendencies, and the other factors influence how those tendencies develop

  10. Influence of Social Environment • Feral childrenand those with very little contact with a social environment do not develop skills such as walking or language. • In some instances, remedial therapy can allow isolated children to develop language and social skills. • Studies indicated that our personalities come from our social environment. • Anna • Confined to an attic until age 6. • Given minimal care and almost no human contact. • Could not walk, talk, feed herself. • Isabelle • Similar to Anna, but had been confined with her deaf mother. • Because of contact with her mother, after months of intense therapy was able to speak and catch up cognitively .

  11. Children who have been institutionalized may share some characteristics of those who have been isolated. • Studies show that a lack of human contact can result in developmental abnormalities as well as death.

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