psych readings exam 2

John and Newport

Johnson and Newport (1989) examine whether there is a critical period for second language acquisition by studying immigrants who learned English at different ages. They found that individuals who arrived in the United States at younger ages—especially before puberty—achieved significantly higher levels of grammatical accuracy than those who arrived later. Performance declined steadily with age until around puberty, after which it leveled off at a lower level, suggesting a biological limit on language learning ability. The results support the maturational state hypothesis, indicating that language acquisition ability decreases with age regardless of prior language experience. Overall, the study provides strong evidence that early exposure is crucial for achieving native-like proficiency in a second language.

Freud

Freud’s theory of personality emphasizes the role of the unconscious mind and internal psychological conflict in shaping human behavior. He proposes that the mind consists of three parts—the id, ego, and superego—which interact to influence thoughts and actions. The id seeks immediate gratification, the superego enforces moral standards, and the ego mediates between them and reality. Freud also argues that individuals use defense mechanisms, such as repression and denial, to manage anxiety caused by these conflicts. Additionally, he outlines stages of psychosexual development in childhood, suggesting that early experiences have lasting effects on personality. Overall, Freud’s work highlights the importance of unconscious processes and early development, though it has been criticized for lacking scientific testability.

Piaget

Jean Piaget’s theory of cognitive development argues that children actively construct their understanding of the world through interaction with their environment, progressing through a series of distinct developmental stages. He proposes that cognitive growth occurs through processes of assimilation (incorporating new information into existing mental frameworks) and accommodation (adjusting those frameworks when new information cannot fit). Piaget outlines four major stages—sensorimotor, preoperational, concrete operational, and formal operational—each characterized by increasingly sophisticated ways of thinking. Early stages involve basic sensory and motor interactions, while later stages allow for logical reasoning and abstract thought. Overall, Piaget emphasizes that children think differently from adults at each stage, and that development follows a predictable sequence driven by both biological maturation and experience.

Kohlberg

Lawrence Kohlberg’s theory of moral development proposes that individuals progress through a series of stages in how they reason about ethical issues, with moral understanding becoming more complex over time. He identifies three main levels—preconventional, conventional, and postconventional—each containing two stages. At the preconventional level, moral decisions are based on avoiding punishment and seeking rewards; at the conventional level, individuals focus on social approval and maintaining laws and rules; and at the postconventional level, moral reasoning is guided by abstract principles such as justice and human rights. Kohlberg argues that these stages occur in a fixed order and are tied to cognitive development, building on Piaget’s ideas. Overall, the theory emphasizes that moral reasoning evolves from self-centered thinking to principled judgment, though not everyone reaches the highest stages.

Gardner

The reading explains Howard Gardner’s theory of multiple intelligences, arguing that intelligence is not a single general ability but a set of distinct capacities that individuals possess in different degrees. Gardner identifies several types—such as linguistic, logical-mathematical, spatial, musical, bodily-kinesthetic, interpersonal, and intrapersonal intelligence—each with its own developmental path and neural basis. He supports this theory through evidence from brain damage, exceptional individuals (like savants), and cross-cultural studies, showing that people can excel in one area while struggling in others. The reading contrasts this view with traditional IQ-based models, which focus narrowly on academic skills, and instead emphasizes a broader understanding of human potential, learning, and creativity. Overall, it suggests that education systems should recognize and nurture diverse intelligences rather than prioritize only a limited set of abilities.