Developmental Psychology — AI Study Guide

Mastering Developmental Psychology

Developmental psychology studies how humans change across the lifespan — from conception through death. The field examines physical, cognitive, social, and emotional development and the interplay of genetic influences (nature) and environmental experiences (nurture). Key developmental questions: what develops, at what rate, in what sequence, and through what mechanisms? Understanding developmental milestones provides the framework for clinical assessment and intervention.

Piaget's theory of cognitive development describes four stages: Sensorimotor (0-2 years, learning through senses and action, developing object permanence), Preoperational (2-7 years, symbolic thinking but egocentrism and lack of conservation), Concrete Operational (7-11 years, logical thinking about concrete objects, conservation), and Formal Operational (12+, abstract and hypothetical reasoning). While Piaget's stage descriptions have been partially revised by subsequent research, his framework remains foundational.

Attachment theory (Bowlby, Ainsworth) examines the emotional bond between infants and caregivers. Strange Situation experiments reveal four attachment patterns: secure (comfortable with exploration, distress at separation, easily comforted), anxious-ambivalent (clingy, highly distressed, not easily comforted), avoidant (little distress, avoids caregiver), and disorganized (no consistent pattern). Attachment security in infancy predicts social and emotional outcomes in childhood and adulthood.

Adolescent development involves physical maturation (puberty), cognitive development (formal operational thinking, identity formation), and social development (peer relationships, autonomy from parents). Erikson's psychosocial stages frame development across the lifespan as a series of crises: trust vs. mistrust (infancy), autonomy vs. shame (toddlerhood), initiative vs. guilt (preschool), industry vs. inferiority (school age), identity vs. role confusion (adolescence), through integrity vs. despair (late adulthood).

Frequently Asked Questions: Developmental Psychology

What are Piaget's four stages of cognitive development?

Piaget's four stages: (1) Sensorimotor (0-2 years): infants learn through sensory experience and motor actions; milestone is object permanence (understanding objects continue to exist when hidden). (2) Preoperational (2-7 years): children use symbols and language but are egocentric and lack conservation. (3) Concrete Operational (7-11 years): logical thinking about concrete objects; children understand conservation, reversibility, and classification. (4) Formal Operational (12+ years): abstract, hypothetical, and deductive reasoning develops.

What are the four attachment styles identified by Ainsworth?

Mary Ainsworth's Strange Situation identified four attachment patterns in infants: Secure attachment (about 65%): distressed when separated, easily comforted on return, uses caregiver as safe base for exploration. Anxious-ambivalent (about 10%): highly distressed, difficult to comfort. Avoidant (about 20%): little distress, ignores caregiver on return. Disorganized (about 5%): no consistent pattern, often associated with frightening caregiving. Secure attachment predicts better social and emotional outcomes.

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