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| in Piaget's theory, the stage of cognitive development (normally beginning at age 12) during which people begin to think logically about abstract concepts | ||
| the fear of strangers that infants commonly display, beginning by about 8 months of age | ||
| an emotional tie with another person; shown in young kids by their seeking closeness to the caregiver and showing distress on separation | ||
| an optimal period shortly after birth when an organism's exposure to certain stimuli or experiences produces proper development | ||
| the process by which certain animals form attachments during a critical period very early in life | ||
| according to Erik Erikson, a sense that world is predictable and trustworthy; said to be formed during infancy by appropriate experiences with responsive caregivers | ||
| a sense of one's identity and personal worth | ||
| the transition period from childhood to adulthood, extending from puberty to independence | ||
| the period of sexual maturation, during which a person becomes capable of reproducing | ||
| the body structures (ovaries, testes, and external genitalia) that makes sexual reproduction possible | ||
| non-reproductive sexual characteristics, such as female breasts and hips, male voice quality, and body hair | ||
| the first menstrual period | ||
| one's sense of self; according to Erikson, the adolescent's task is to solidify a sense of self by testing and integrating various roles | ||
| in Erikson's theory, the ability to form close, loving relationships; a primary developmental task in late adolescence and early adulthood | ||
| the time of natural cessation of menstruation; also refers to the biological changes a woman experiences as her ability to reproduce declines | ||
| a progressive and irreversible brain disorder characterized by gradual deterioration of memory, reasoning, language, and, finally, physical funtioning | ||
| a study in which people of different ages are compared with one another | ||
| research in which the same people are restudied and retested over a long period | ||
| one's accumulated knowledge and verbal skills; tends to increase with age | ||
| one's ability to reason speedily, and abstractly; tends to decrease during late adulthood | ||
| the culturally preferred timing of social events such as marriage, parenthood, and retirement |
