Kigezo:Human development

Human Development: Biological • Psychological

Diagram of approximate ages and stages of child development. Many periods of time overlap, and all periods are approximate. Newborn or neonate runs from nought to three months. Infancy from nought to eleven months. Toddlerhood from eleven months to three years. Childhood from two to thirteen years. Play age from one to seven years. Preschooler from three to six years, primary school from five to eleven years, then secondary school to eighteen years. Preteen from nine to twelve years. Preadolescence from nine to thirteen years, then adolescence to eighteen years, and adult after that. Puberty from twelve to nineteen years in boys, and from ten to seventeen years in girls.

Pre- and perinatal

Infancy

Childhood

Adolescence

Young adulthood

Middle adulthood

Maturity

Legal and general definitions

Minor (law) · Infancy · Child · Childhood · Adolescence · Age of majority · Adult

Theorists and theories

Bowlby—attachment · Brofenbrenner—ecological systems · Erikson—psychosocial dev. · Freud—psychosexual dev. · Kohlberg—moral dev. · Piaget—cognitive dev. · Vygotsky—cultural-historical psych.

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