#attachment
- Abstract thinking
- Adolescence
- Age effects
- Aging
- Andropause
- Attachment
- Attachment theory
- Audition
- Babinski reflex
- Body fat
- Bone density
- Brain
- Categorization
- Centration
- Cephalocaudal trend
- Classification
- Cognitive aging
- Cognitive development
- Cohort effect
- Concrete operational stage
- Conservation
- Contact comfort
- Continuity
- Conventional morality
- Critical period
- Cross-sectional study
- Cross-sequential design
- Death and dying
- Deferred imitation
- Developmental psychology
- DNA
- Egocentrism
- Elisabeth Kübler-Ross
- Emerging adulthood
- Environment (psychology)
- Epigenetics
- Erik Erikson
- Executive functions
- Face perception
- Fetal brain development
- Formal operational stage
- Gene
- Genotype
- Grasp reflex
- Harry Harlow
- Heredity
- Human Development — Vocab Index
- Hypothetical thinking
- Identity vs. role confusion
- Information-processing approach
- Instrumental relativist orientation
- Interpersonal relationships
- Irreversibility
- Jean Piaget
- Jeffrey Arnett
- Law-and-order orientation
- Lawrence Kohlberg
- Lean body mass
- Lev Vygotsky
- Lifespan
- Longitudinal study
- Marriage
- Mary Ainsworth
- Menopause
- Moral development
- Nature–nurture debate
- Object permanence
- Olfaction
- Parenting styles
- Phenotype
- Physical development
- Physical strength
- Postconventional morality
- Preconventional morality
- Prenatal development
- Preoperational stage
- Primary sex characteristics
- Protein
- Proximodistal trend
- Puberty
- Punishment–obedience
- Reaction time
- Renée Baillargeon
- Rooting reflex
- Scientific reasoning
- Secondary sex characteristics
- Sensitive period
- Sensorimotor stage
- Sexual maturity
- Social contract orientation
- Social development
- Stage
- Stage theory
- Stepping reflex
- Strange Situation
- Stranger anxiety
- Sucking reflex
- Symbolic play
- Symbolic thought
- Teratogen
- Theory of mind
- Universal ethical principles
- Universals (development)
- Zone of proximal development (ZPD)