| Developmental Psychology | Study of how people change from birth to old age; changes over the life span that includes thinking, language, intelligence, emotions, & social behaviorspecifically the hows and whys changes occur |
| Biographical or Respective Study | A method of studying developmental changes by reconstructing people’s past through interviews and inferring the effects of past events on current behaviors |
| Embryo | Prenatal period-2 weeks after conception to 3 months; Cells begin to specialize: internal organs, muscles and bones, skin and nervous system |
| Placenta | Organ that nourishes the embryo and fetus; the mother’s blood vessels transmit nutritive substances to the embryo or fetus and carry waste products away from it; Diseases and teratogens can cross the placenta and infect the fetus, compromising the baby’s development. |
| Neonate | Newborn babies; sleep up to 20 hours a day |
| Sucking Reflex | Newborn reflex/tendency to suck on objects placed by the mouth |
| Grasping Reflex | Newborn reflex where babies ling to objects placed in hands; normally disappears after 2 or 3 months and reemerges later when voluntary grasping begins (typically around 5 months) |
| Temperament | Characteristic patterns of emotional reactions and emotional self-regulation; Thomas and Chess (1977) devised 3 temperaments: Easy-good-natured and adaptable, easy to care for and please; Difficult-moody and intense, reacting to new people and new situations both negatively and positively; Slow-to-warm-up-relatively inactive and slow to respond to new things, and when they do react, their reactions are mild; Kagan (1988) added a 4th temperament: Shy-timid and inhibited, fearful of anything new or strange |
| Developmental Norms | Average ages that children reach developmental milestones: 6 mos-babbling, 9 mos-stand with assistance, 10 mos-crawling, 12 mos-walking, 18 mos-vocabulary of 50-70 words |
| Object Permanence | concept from Piaget; major milestone in Sensory-Motor Stage; The concept that things continue to exist even when they are out of sight; “out of sight, out of mind”, typically achieved by 18 to 24 mos (meaning the child realizes that the object exists if it is out of sight) |
| Preoperational Stage | second stage of Piaget’s cognitive development; 2-7 years; main activities involve fantasy play, symbolic gestures, egocentrism; understand object permanence and mental representations; must achieve conservation and egocentrism |
| Concrete Operational Stage | third stage of Piaget’s cognitive development; 7-11 years; main activities involve complex classification, can see things from another person’s point of view; reversibility, think about things in the “here-and-now”; understand conservation |
| Formal Operational Stage | fourth stage of Piaget’s cognitive development; 11-15 years; main activities involve problem-solving, reversibility, complex thought, abstract thought |
| Imprinting | formation of a strong bond to the first moving thing (usually a mother) it sees after it is born; Ducks and geese |
| Autonomy | sense of independence; a desire not to be controlled by others; main concept in Erikson’s second psychosocial stage |
| Puberty | onset of sexual maturation, with accompanying physical development; symptoms include growth of pubic hair, development of secondary sex characteristics (breasts, testes, penile enlargement) |
| Imaginary Audience | Elkind; adolescent fallacy; tendency of teens to feel they are constantly being observed by others, that others are being judging them on their appearance and behavior; feeling of being perpetually “onstage”; may be the source of much self-consciousness, concern about personal appearance, and showing off |
| Identity Formation | Erikson; stage of adolescence where teens are to develop a stable sense of self necessary to make the transition from dependence on other to dependence on oneself |
| Clique | groups of adolescents with similar interests and strong mutual attachment; early adolescents tend to group in small unisex groups of 3 to 9 members; as teens settle into more stable dating patters the cliques enlarge and include both genders |
| Midlife Transition | According to Levinson, a process whereby adults assess the past and formulate new goals for the future; taking stock of life |
| Longitudinal Study | A method of studying developmental changes by evaluating the same people at different points of their lives, for example every 5 years |
| Prenatal Development | Development from conception to birth; fertilization of egg, division of fertilized egg & the process that transforms it from a 1-celled organism to a complex human being; Embryo-2 weeks after fertilization the implanted cells begin to specialize to 3 months: internal organs, muscles and bones, skin and nervous system; Fetus-3 months to birth-1” in length and resembles a human |
| Fetus | Prenatal period-3 months-birth; 1” in length and resembles humans with a head, arms/legs, and a heart that beats; by 4 months mother will begin to feel the movements in the uterus. |
| Critical Period | first 3 months of pregnancy when external and internal influences have a major effect on development |
| Rooting Reflex | Newborn reflex that causes a newborn baby to turn its head toward something that touches its cheek and to grope around with its mouth |
| Egocentric | concept of Piaget; major milestone in Preoperational Stage; inability of preschool children to see things from another person’s point of view. |
| Principles of Conservation | concept of Piaget; major milestone in Preoperational Stage; concept that the quantity of a substance is not altered by reversible changes in its appearance; Example-2 glasses (one tall, one short) with equal amounts of juice but the child thinks the tall glass has more juice because it is taller. |
| Holophase | one-word sentences used by a 1 to 2 year old child; Up! No! More! |
| Attachment | emotional bond to the people who care for the child built on hours of interactions otherwise known as basic trust; According to Erikson this is the first psychosocial crisis; According to Ainsworth developed a series of 3 (or 4) types of attachment styles which she states that the attachment to the first caregiver will follow the child through other relationships in life |
| Socialization | process by which children learn the behaviors and attitudes appropriate to their family and culture; essential first step in socialization; important for Erikson’s second stage |